Radio Boulevard
Western Historic Radio Museum

Radio Telegraphy - Straight Keys to Bugs

Straight Keys
- Spark Keys, Radio Hand Keys -
- Military Hand Keys, Flame-Proof Keys -

Semi-Automatic Telegraph Keys (Bugs)
Standard & Deluxe Models)
Speed-X..... (
Stewart Johnson, Les Logan, E.F.Johnson)
McElroy Mfg.Corp......(
Deluxe Mac, Super Stream)
Other Bugs....
(73, Speed-Bug, Buzza, Dow-Key, Cedar Rapids)

Telegraph & Morse Code Learning Accessories

Landline Telegraph Equipment

by: Henry Rogers WA7YBS/WHRM

photo from: QST - Cover -  May 1942

At one time, the language known as International Morse was just about the only way the radio communications could be carried on. Every radio operator from Commercial ops to Radiomen in the Navy, the Army and the Coast Guard and ALL Hams knew and used International Morse. It was a LANGUAGE that was understood by both young and old radio operators who had the interest, the desire and the discipline to learn and become accomplished at conversing in this most reliable of communications modes. International Morse Code's ability to allow 100% copy in the most difficult of conditions that would leave any spoken language incomprehensible is legend.

Spark Keys, Radio Hand Keys, Military Keys & Flame-proof Keys

Used by professionals and amateurs alike, the Hand Key dates from the nineteenth-century. Several versions are still currently in production and are still being used. Simple to operate and virtually incapable of making errors, the Hand Key is the basic tool for the radio telegrapher. Hand Keys are also known as Straight Keys in the ham world.  The following Hand Keys are categorized as "Spark Keys," "Radio Keys," "Military Keys," "Flame-proof Keys" and "Currently Manufactured Hand Keys."

Spark Keys

L. S. Brach Supply Co.

U.S. Army Signal Corps  J-6

The J-6 was used by the Signal Corps for the small airborne spark transmitters that were in use at the end of WWI up into the early 1920s. Usually the spark transmitter very low power and the high voltage was supplied by an air-driven generator that was mounted in the struts of the landing gear. The receivers were powered by batteries. Communications was primarily for aiming ground artillery during late-WWI. The J-6 key is mostly brass construction and is mounted on a hard rubber base that was mounted by screws to the wooden frame work of the airplane. The knob became the standard for early radio telegraph keys for the Signal Corps, especially those keys from Brach - see the Brach J-5-A below in "Flame-proof Keys."

Of note on the J-6 is the location of the return spring. It is behind the trunnion pivots and "pulls the lever down." When pressing the knob down, the key contacts make no noise. However on the release, you will hear a "click." This is the opposite of nearly all other Hand Keys. The resulting aural message results in user confusion and difficulty using the key. But, the J-6 was usually installed in an open cockpit biplane and the "spotter" wore a headset so the opposite "clicking" wasn't even heard during normal operation.


Wireless Improvement Company

2KW Auxiliary Hand Key - Type SE68A

The SE68 Hand Key first appeared during WWI. Many were built by the Navy Shipyard at the Boston. After WWI ended, the SE68A appeared and is virtually the same as the "non-A" version. These keys, with their enormous 5/8" contacts (that were easily replaceable when worn) were ideal for powerful, direct-keyed spark transmitters in use at the time, both by the Navy and by commercial ships. The SE68A shown is a post-WWI example made for U.S. Shipping Board on a contract that dated from 1920. These keys have a cast brass lever and cast brass bearing yoke. The base is made of hard rubber. Originally, the SE68 and SE68A keys were what was called a "leg-key," that is, they had long threaded rods (~ 4" long) on the bottom of the key base. The key was mounted to the table with four screws (holes at each corner of the base) while the rods protruded through two larger holes in the table. The transmitter keying wiring was connected to the rods with the wiring being routed under the table. It's common to find these keys today with their legs removed as this example shown ("as found" photo) was. Also, originally, the lever and the yoke were painted black. Again, it's common to find the paint scrubbed off to reveal the metal's cast brass color.

photo above: the SE68A "as found" condition

On the key shown above ("as found,") many of the brass parts have been "brass plated" over the vintage patina. For some reason, the data plate seems to have escaped the crude restoration mayhem and appears to have its correct patina. Originally, there was a small braided wire cable connected to the screw on the bottom of the lever and then connecting to the screw on the yoke. The return spring is an incorrect gauge size wire with too few turns. At least,  the Navy "Finger Rest" type of knob is the correct style (but is of more recent manufacture.) The SE68A keys were later sold as surplus to hams and are advertised in the back section of the 1937 ARRL Handbook (for $7.50.)

Return to Authentic Appearance - Normally, telegraph keys shouldn't be restored. However, this only applies to keys that are in original condition, complete and with the original patina. When a key has been the victim a non-authentic or a crude restoration, such as the example shown, I advocate that the key should be returned as close as possible to its original appearance. Many times, accurate replica parts have to be made. Authentic finishes have to be used, such as nickel-plating or painting with nitrocellulose lacquers. Attention to detail will result in the key looking authentically correct even though it will never be an "original example."

This SE68A was disassembled to allow returning the correct finishes to the metal pieces. Some sort of brass plating was applied to several of the pieces and this proved to be difficult to remove. I used a powered rotary brass bristle brush to remove this non-original plating. I needed the brass base metal to be exposed to allow applying "brass patina" to these pieces. The patina is a liquid chemical treatment that darkens the brass to impart an "aged patina" appearance. Once these brass pieces were treated, then the lever and yoke needed to be returned to an original finish. After examining several SE68A key photos on the internet, it appeared that most had the lever and yoke painted black. I assumed (from the time period) that this was probably Japan finish which is black nitrocellulose lacquer. I painted the pieces with nitro-lac and then an aged appearance was imparted by scuffing the paint with various grades of abrasives (from steel wool to scrapes with metal tools.) Exposed metal was then treated with patina to age the "paint chip."  I had to make the braided wire cable that connects under the lever and to the yoke. I used copper braid harvested from RG-58 coax. The ends were soldered to allow these ends to be flattened and a hole punched to allow the connections to be made. The braid was given the patina treatment to age its appearance.  Also, a conical spring was wound using "hard drawn" 16 gauge steel wire. The appearance of the spring was based on photographs of original SE68A keys.

From examination of photos of original SE68A keys it appears that the legs were removable in that the threaded extension rods could be de-soldered from the base couplers. These couplers appear to be brass tubes about one and a half inches long. One end of each coupler is sweat-soldered to each of the base connection extensions that are 1/4" diameter by about 5/16" long. The threaded rods are then inserted into the couplers and sweat-soldered. This allowed the connections from the key to the transmitter to be located under the table. The key base was mounted to the table top by four screws so the legs were only for electrical connection. In some installations it might be desired to connect the SE68A to the transmitter above the table. In this case, the extension rods and couplers could be removed (unsoldered) and the wire connections soldered directly to the base extensions. This type of "legless" mounting would require some method of routing the wires from under the key across the table top to the transmitter. Either an elevated mounting base with holes for routing the wires or (more crudely) notching the base of the key.

The finished "return to original appearance" results are shown in the photos below. The photo below-left shows the legs and how they are sweat-soldered to couplers. The photo below-right shows the top details with the braided lever to yoke connection and a more accurate return spring. Also note that the shaft pin lock is a true set screw now. The SE68A now not only looks authentic and original but it also now functions correctly with a nice feel and precise accuracy to its sending ability.



Clapp-Eastham Company

 Boston Key

Boston Keys were large hand keys built by several wireless equipment companies from around 1915 up into the early twenties. The design was based on the type of keys built by the Boston Navy Yard before WWI. Boston Keys had large contacts and generally had side connection terminals. Most keys were fitted with Navy-type finger-rest knobs and had large, heavy bases.

Clapp-Eastham (C-E) started around 1906 building X-ray equipment  Since a lot the X-ray equipment parts were exactly what could be used for spark transmitters, the company began to supply that end of the market. Eastham started General Radio Company in 1915 and left C-E around 1917. C-E  was gone by the mid-twenties.

The Boston Key that C-E produced was available starting around 1915. The bases were either marble or hard rubber (sometimes called Condensite.) The hard rubber bases were engraved with "Clapp-Eastham Co. Boston Key" and on both types the key lever was engraved "Clapp-Eastham Co." These keys were available up to about 1921 or so. They were very popular and well-made making them capable of sending excellent Morse.


A.W. Bowman Co.  for  Sears & Roebuck Co.

"Meteor" Boston Key

A.W. Bowman started producing this large hand key around 1915. Like Clapp-Eastham's key, Bowman's was also based on the keys produced by the Boston Navy Yard. Since both types are based on the same style of key they are very similar in design. About the only deviation between the two builders is the flat bar stock that Bowman used for the key lever and the adjustable trunnion screws that are absent from the Clapp-Eastham Boston Key. Bowman's key used marble for the base giving the key substantial weight and stability.

Around 1920, Bowman contracted with Sears & Roebuck (and possibly Montgomery Wards) to produce the same key for them to sell as the "Meteor" key. The "Meteor" key is exactly like the standard Bowman except there isn't any manufacturer identification on the Sears version. The standard Bowman keys had "A. W. Bowman" stamped on the top-rear of the key lever. Contacts are 3/8" diameter. Once the Bowman-Sears Meteor key has been properly adjusted it has a really nice comfortable feel and it's very easy to send excellent Morse at a moderate speed.


J. H. Bunnell & Co.

Straight Line Radio Key

J.H. Bunnell & Company was formed in 1878 by Jesse Bunnell, who had a long history (even at that time) in the telegraph world. The company was located in and around New York City but changed locations fairly often for various reasons. Bunnell, before WWII, was the largest supplier of telegraphic equipment. There were various owners after Jesse Bunnell's death but the company did continue on with other owners. Bunnell was sold to INSO Electronic Products in 1960 and then to it's current owners, MNJ Industries, in 1989.

In 1919, Bunnell introduced a large base radio hand key that was called the Straight Line Radio Key. This large version had a set of auxiliary contracts that closed with the key lever up and opened with the key lever down, or, the opposite of the sending contacts. Also available was the "short base" version with the auxiliary contacts removed and the key itself mounted on a "short" base. Although possessing 3/8" contacts, the Radio Key was probably intended for smaller spark transmitters or vacuum tube transmitters. This style Straight Line Radio Key was available through the twenties and into the early thirties. The base is hard rubber. There are two versions of the Straight Line Radio Key. One version (shown) has the upper contact position adjustable. Some keys will have the upper contact non-adjustable and the lower contact adjustable from underneath the key base.

The metal parts on the Straight Line Radio Key should be nickel-plated but when found this key was an obvious victim of a terrible restoration. The nickel plating had been removed and bee's wax rubbed all over the key. A Navy knob was added. Normally, vintage telegraph equipment should be left in "as found" condition if the piece is original. However, the horrible restoration attempt had this key begging to be returned to its original appearance.

Complete disassembly was necessary to be able to thoroughly clean all of the brass parts in preparation for nickel-plating. The key lever was bent as can be seen in the "brass" photo above. Note that the knob is pointing at an angle instead of being vertical. The lever was easily straightened by holding the lever in a vise (equipped with brass jaw covers) and using a weighted hammer to "tap" the lever straight. I then used NaOH to remove all of the wax and other contaminates from all of the brass parts (sodium hydroxide is readily available as Easy Off Oven Cleaner.) Nickel electro-plating requires pure nickel anodes, a nickel sulfate solution and a very low voltage. The voltage used is < +4.5vdc with about .3A to .5A of current but this depends on how many parts are being plated at one time (depends on the total metal surface area.) Plating only takes a few minutes for small parts mainly because the original nickel plating on these keys was fairly thin. The large key lever took about 8 minutes to plate. The contacts weren't plated since they are silver and were in decent condition. The base was cleaned of bee's wax and then polished with Wenol's polish. The key was reassembled and a proper (vintage) knob installed. As can be seen in the after photo right-below, this Bunnell Straight Line Radio Key is now much closer to an original appearance than it was before. It also functions much better than it did before.

 photo above: "as-found" condition

photo above: after cleaning, lever straightening and nickel-plating the metal parts


Signal Electric Mfg. Co.

Heavy Duty Hand Key

Signal Electric started out in the 1890s as Menominee Electric Co. since they were located in Menominee, Michigan. The company built and sold telephone and telegraph equipment. The company also built some wireless items like loose couplers and other electrical parts. The name was changed to Signal Electric Manufacturing Company and they remained in business until the 1960s when they were purchased by a Thermos company. The hand key shown below to the left is a Signal Electric Mfg. Co. - Heavy Duty Key. These keys date from the twenties to the thirties and were available with different size contacts depending on the intended service. This key has 3/8" contacts implying that it could be used for medium duty spark gap transmitter applications. However, early vacuum tube transmitters were cathode keyed and the key contacts might also carry a fairly high current flow. The Signal key is identified by a manufacturer stamping at the rear of the key base between the connection terminals. This particular style of hand key was also built and sold by other manufacturers, like the Standard Co. version shown in the photo below to the right. This key doesn't have the Navy-style finger rest but does have 3/8" contacts and is virtually identical to the Signal version. Standard keys are not manufacturer identified. Most of these types of keys are brass construction with a gold lacquer "wash" applied. This key style was very popular and it was produced for many years by several different manufacturers. Other examples can be seen in the "Straight Keys" section below (although these are later, inexpensive keys.)

Signal Electric Mfg Co.  - Heavy Duty Hand Key

Standard Co.  - Heavy Duty Hand Key


Radio Hand Keys

Straight Keys

The typical key used by ham operators and sometimes even professionals. Though Hand Key is the name generally applied to these types of telegraph keys, hams usually refer to this type of key as a "Straight Key." Most hams learned the code using a straight key and after they had built up their speed switched over to a semi-automatic key (a bug.) Many hams stayed with the straight key because of its simplicity and accuracy - something that took a lot of practice with a bug (or later using an electronic keyer.)

The straight key shown to the left is a late-production E. F. Johnson Speed-X "Navy Style" hand key. The contacts are 1/8" diameter which is typical for a "radio key." These straight keys were available for many years (note the other Navy Style keys in the photo below not to mention the Signal Heavy Duty Wireless hand keys above.) This particular Johnson Speed-X hand key is the type that I used when first learning the code and while I was a Novice ham. The key always had a good "feel" to it and the Navy knob makes sending very easy.


More straight keys,...

The key on the left is a Speed-X Model 321 with a Navy "finger rest" type knob and chrome plating around the edge of the base. I have this key's original box in which it was found. Price tag on the box is marked $3.50. The next key is also a Speed-X in the standard base configuration with nickel plating. Both Speed-X keys are Les Logan manufacture (1937-1947.) The next key is a Depression era hand key that uses a lever and bearing support that are made from thin bent sheet metal stampings. These type of keys usually sold for about fifty cents during the thirties. The key on the far right is another really "cheap" key. It relies on the "springiness" of the lever to provide the action with no bearings at all - really a cheap one but at least they polished the pot metal base.


T.R. McElroy "World's Champion Radio Telegrapher"

aka: McElroy Manufacturing Corp.  -  Model 300 Stream Hand Key

Ted McElroy was a champion radio telegrapher of the 1930s up into the early 1950s. His receiving speed was advertised as 55wpm in the mid-thirties but ultimately Ted was clocked at over 70wpm. Ted's company seems to officially have been "McElroy Manufacturing Corporation" (officially formed in 1941) but most of his earlier telegraph key name-plates will have "T. R. McElroy - World's Champion Radio Telegrapher - Boston Mass." as the company name. Around 1955, McElroy sold his business to Telegraph Apparatus Corp. (T.A.C.)

The Model 300 Stream Hand Key is from 1940. McElroy had built other chrome stream keys earlier and these models had slightly longer and thinner bases. The earliest chrome types (Model 200) have a metal tag on the base just under the knob (~1939.) A second variation will have the "thin base" with either a decal tag or no tag. The last type is the Model 300 with the thick base and no tag. Other models of McElroy Stream keys can be found with either black wrinkle finish bases or the bases were made out of black molded plastic. The Model 300 sold for a mere $2.85 in 1940. The Model 300 is an excellent hand key with a nice feel and great stability due to its shape that puts most of the base weight is at the rear of the key.


Military Hand Keys

The Lionel Corporation

U.S. Army Signal Corps  -  J-38  &   J-47

These are the standard WWII hand key. The J-38 and J-47 were found in many different environments during WWII. The J-38 typically was used in landline set-ups as noted by the secondary set of terminals at the rear of the key marked "TEL" and "LINE." The lever switch must be "closed" for land line reception. Probably the most famous use of the J-47 was as the key used with the SCR-287, the airborne liaison radio station on bombers and transports during WWII. The keys were typically built under contract and most contracts went to Lionel but sometimes other contract manufacturers are found (McElroy made some J-38 keys.) The J-47 is typically found without the shorting lever installed even though the stationary part of the switch is present. This was because the J-47 was primarily a "radio key." J-38 keys always have the shorting lever since they were primarily a "land line key.". Both keys shown are mounted on their original bakelite bases which have the "L" embossed on the bottom to signify "Lionel." The J-38 and J-47 are known for their excellent action and feel. They are still very popular hand keys.

The Lionel Corporation

J-38 in Original Box
Contract No. 25860-PH-55
Warren Mfg. Co., Inc.
Littleton, Mass.

This J-38 was found in its original box and it, of course, is in near-mint condition. What is shown on the box indicates that it was packed 11/55 and had been built on a 1955 contract. The interesting thing is that the key base has the "L" embossed on the bottom indicating it's a "Lionel J-38" but the box printing indicates that it was built by Warren Manufacturing Company located in Littleton, Massachusetts.

Reduced post-war demand for the J-38 must have meant fewer contracts were issued. Were there leftover parts made during WWII that were still available? Could Warren Mfg. Company have assembled these J-38s from surplus Lionel bases and other Lionel parts? Or, did Warren build new parts and copy the Lionel J-38 exactly,...right down to the "L" on the base? Another possibility is that Warren just repackaged surplus WWII "Lionel-built" J-38 keys. Whatever happened, the end result is a very nice hand key with an excellent feel and precise sending ability.

Many of the WWII military transmitters used internal keying relays or sending relays that switched the antenna and receiver standby functions between transmit and receive as the key was operated. Although many military manuals will state that sending speeds can be over 20WPM, most of the time 15WPM is about the upper limit. This is mainly because of the relay's mechanical movement involved with the sending function. I use a J-38 key for most CW operations when using WWII vintage military transmitters. The J-38 just about can't be beat for the best "feel" and the best keying function when you absolutely must use a hand key.


Signal Electric Manufacturing Company


Signal Electric had been making telegraph keys along with other electrical items since the turn of the century. During WWII, they produced hand keys for the military, like this Type M-100 key. This key is fitted with a rubber cable and PL-68 connector which indicates it was going to be used with military equipment. This M-100 was found in its original box as shown.  


Flame-proof Keys

Many of the military keys were used with transmitters that were cathode keyed and sometimes had significant voltage on the key itself. Also, other types of equipment may have voltage levels or current levels that could cause sparking when the key breaks contact. This could present a problem in areas where flammable fuel vapors might at times be present, such as airplanes, tanks or ships during or after an attack where fuel tanks or fuel lines may have been ruptured and leaking. The flame-proof key enclosed the contacts in a sealed chamber to prevent exposure of the possible sparking to any combustible vapors so it would be possible to radio for help. The J-5-A on the left is a Signal Corps key that was introduced in the thirties but was built for many years, in fact the one shown is from WWII - built by L. S. Brach Mfg. Co. The key in the center is a Navy flame-proof key, the CAQZ-26026 built by Brelco Co. The key on the right is a British "Bath Tub" flame-proof key that is made out of bakelite. The bale clamp holds the upper part of the key (which has all of the key parts) down into the tub. There are many other types of flame-proof keys but all accomplish the same thing, isolation of the key contacts to prevent exposure of possible sparking to a combustible vapor.

U.S. Navy - CJB-26003A - Flame-proof Key - Here's another popular USN flame-proof key that was built by several different contractors during WWII. This example happens to have been built by J. H. Bunnell & Company. The various contractors will result in different letter prefixes with the "C" indicating Navy Communications and the "JB" being for Bunnell and then the model number of the key, 26003A. Other contractors will be identified with the two letters after "C." These keys were generally used on Navy aircraft. Also, this example is missing the cover that goes over the connection terminals.


U. S. Navy - CLT-26012 - Insulated Hand Key

Lundquist Tool & Mfg. Co. - Contractor

There is a whole series of Insulated Hand Keys (aka: General Purpose Key) that were manufactured for the Navy. The base is bakelite, hard rubber or some other kind of moldable plastic. The connections are recessed inside the base and the external connections are made via insulated binding posts. Additionally, these keys all feature a slot in the left side of the base to allow the insertion of a semi-automatic telegraph key wedge. This was an easy way for the radio operator to "plug in" his bug while on duty and then remove the wedge plug and take his bug with him when he went off-duty. The bugs were generally considered personal property even though probably issued by the military so each radio op that was approved to use a bug (and not all were) would keep his bug with him. However, the hand key was usually mounted to the operator's desk and couldn't be removed. Sometimes the 26012 keys were part of a larger transmitter keying set-up. The key shown in the photo is the CLT version 26012 which indicates that it was built by Lundquist Tool during WWII.


U.S. Army Signal Corps  -  KY-116/U  "Leg Key"

Winslow Electronics - Contractor

"Leg Key" generally refers to the two mounting bolts that were on many types of hand keys that allowed the key to mount to a table and have the bolts protrude through the table top to allow connecting the wires below the table rather than routing the wires across the top of the table. Of course, "Leg Keys" assumed you didn't mind drilling holes in the table so, for hams anyway, true "Leg Keys" weren't very popular. The key shown to the right is another type of "Leg Key" - one that actually clamps to your leg and allows you to send CW without the benefit of a table. These keys would have been used by the military and were necessary for portable operation in the field where that operation might be from a Jeep or other type of vehicle. Generally, these "Leg Keys" were provided if it was necessary to use CW. The primary mode of communications was usually Voice however, CW provided better communications accuracy in poor conditions such as heavy static or weak signals, so the option to run CW was always available. These types of keys were in use from WWII up through the 1970s (and probably later.)

This KY-116/U was built by Winslow Electronics and uses a standard J-37 key mounted on a hinged base with leg clamps. The hinged base allows the key to be turned upright to set on a desk, if available. The key is shown in the down position for clamping onto the operator's leg. Actually, operating the key in this manner is pretty comfortable and pretty good CW can be sent with the key clamped to your leg (yes, I've actually had a CW QSO using this leg key to operate an AN/GRC-19 set.) Certainly, the method was not for long-term operation and was intended for portable use where a table or desk wasn't practical.



 2320 "Leg Key"

This is a Canadian Leg Key used by the military for various purposes. The key mechanism is covered with a protective metal box and all adjustments are under the cover. Canvas straps allow the user to mount the key to their leg for sending in the field. This key is specified as:

ZA/CAN  2320

This key was in its original box and was donated by Jim W9OFQ


Currently Manufactured Hand Keys

The Vibroplex Company

Standard Hand Key

The Vibroplex Company never made a hand key until recently. Vibroplex has designed a large hand key that uses some Vibroplex Original parts and some other parts specific for this design. As the advertising used to say, "Vibroplex never made a hand key but if they had this is what they would have produced." That's paraphrased, but you get the idea. This large hand key is still available from Vibroplex in Standard black finish base, blue finish base, chrome base or gold base. An earlier version is shown featuring the gray base that was being produced then.

While this Vibroplex hand key is beautiful and very well-built, it might be difficult to use depending on the individual operator. The problem is with the aural information versus sending action. As the key lever is pressed down the mechanical contact is silent but the upward return of the lever makes an easily audible "click." This is the exact opposite of a regular hand key. Note description of the Signal Corps J-6 hand key.

Looking at the frame, note that the return spring is acting on the rear-top of the lever applying a downward force. Standard return springs are in front of the trunnion and are loading the bottom of the lever with an upward force. Just this slight change in the return spring location is responsible for the "opposite" click. Most hand key users listen for the "click" and feel the return as their method of determining proper forming of the Morse characters when sending without a monitoring oscillator. With the "opposite" aural information being heard, confusion results. The solution is to use a CW monitor and ignore the "opposite" clicking.


R.A. Kent, Engineers

The Kent Hand Key

Robert A. Kent started his engineering business in 1965 dealing in mechanical engineering projects that eventually evolved into the designing and building of various types of "Morse Keys." The present owner is Robert S. Kent (son of "A") and he also is assisted by two of his sons. The company is located in Tarleton, Preston in the UK.

Kent Engineers builds several replicas of vintage-type Morse Keys but their standard is "The Kent Hand Key." It is made out of brass parts with ball-bearing suspension mounted on a mahogany base. All wiring is located inside a mortised area on the bottom of the base that is covered with a full bottom sheet metal plate that's covered with felt. The Kent Hand Key is a very long key with a large early-style knob and finger rest. The Kent Hand Key has a "pull down" spring behind the trunnions. This usually results in "click" sound as the key returns to the up position but because of the wooden base being somewhat hollow the key produces clicks both on contact and on return so the aural information isn't confusing. These large hand keys can provide an excellent "feel" to leisurely-sent CW. Current selling price is L99.50.


Why Knowing International Morse and Following the CW QSO Format is Important for DX QSOs

International Morse, Radio Jargon and DX - There's no doubt that CW using Morse allows 100% copy in the most difficult receiving conditions. But, have you ever thought about the language of "Morse" and how it allows radio operators that don't know each other's respective spoken languages to still carry-on a conversation?  

At one time, all radio ops, no matter where in the world they operated from, spoke "Radio." It was a jargon that all radio ops had to know and the mode used to "speak Radio" was CW and the language was International Morse. Since all hams HAD to know Morse to pass their exam, they knew the basics of the language and, with experience, they soon learned the Radio Jargon. It didn't matter that via CW you were conversing with a ham in Japan that didn't speak English - he knew Morse and he knew Radio Jargon, therefore he could intelligently converse with you or any of the other hams in the world.

The limitation to conversing in CW Radio Jargon is, of course, you must adhere to the QSO format, use standard Q-signals, use standard abbreviations, stick to "radio" topics and, most importantly, "rag chewing" was not an option.

CW Protocol and QSO Format - Part of speaking "Radio" via CW is to adhere to the CW Protocol and the CW QSO format. This made conversing in Morse much easier since you knew your radio contact was going to send certain information in a certain order. When working a DX station on CW, this assured that the important information was in the first part of the contact. When the DX station didn't speak English, following the CW QSO format was essential. Part of learning Morse and becoming a ham was to learn the Q-signals, the correct CW protocol and what the standard format of a CW QSO consisted of.

The standard CW format was to send, in order, the station's RST, your QTH and your name on the first round. With the "hand off" you sent his call sign, then "de" your call sign and "K." The next round you sent Your Rig's Pwr and your Antenna then your WX and, briefly, you might sent your QSL info ("QSL via bureau.") This round was then concluded with "TNX QSO CUL 73" and the QSO completion of both call signs followed by "SK."

By following the standard format of a QSO, foreign ops that weren't fluent in English could easily copy and know what you were saying because they knew Morse, they knew Radio Jargon and you were following the standard QSO format using the proper CW Q-signals and proper CW abbreviations.


Semi-Automatic Telegraph Keys - Bugs, a.k.a. Speed Keys

Mechanical semi-automatic telegraph keys date to the beginning of the twentieth-century with the "Martin Vibroplex" keys introduced in 1904, patented by Horace Martin (the pendulum-type dot mechanism was initially patented by William Coffe who was associated with the Mecograph Co.) Many other companies tried to invent different methods of generating a reliable "dot stream" but Martin's "Original" (Single Lever) design was the most reliable and certainly the most imitated. The nickname "Bug" probably originated with users noting the red "Lightning Bug" logo that appeared on later Vibroplex metal tags starting in the twenties. The "Bug" nickname ultimately was applied to any semi-automatic key regardless of manufacturer.

A note on early Vibroplex keys,...those made before about 1921 were strictly for use on telegraph landlines as the contacts were only .062" diameter. Most of the spark transmitters in use before that time required large current capacity which was accomplished using very large key contacts that limited their installation to fairly large hand keys. Vacuum tube transmitters started to gain popularity in the very early twenties. In 1921, Vibroplex increased the contact size to .125" and, since the current requirements for tube transmitters was far less than spark transmitters, Vibroplex keys started to then be used as "radio keys." Vibroplex's first ad in QST was in 1925.

The Vibroplex Company

The Vibroplex Company - Brief History

Horace Martin was the earliest of the bug manufacturers, producing Autoplex semi-automatic keys in 1903. Martin developed the basic idea for all "modern" bugs - the "Vibroplex" that utilized a vibrating pendulum to create a dot stream with manual creation of dashes, although the actual patent originally belonged to William Coffe (Mecograph Co.) The patent for the Martin's Single Lever dates from 1904 (Coffee's patent was filed four months earlier) and this was the first (or earliest) model "bug" offered. "Vibroplex" and "Autoplex" keys were originally sold through United Electrical Manufacturing Co. in New York. Most of UEM's time was spent in court going thru various patent suits (mainly from Mecograph.) The UEM Company failed in 1908.  >>>

Vibroplex Original  aka: Martin Single Lever SN: 70837  (1919)

>>>  Ultimately, Martin partnered with J. E. Albright in 1911. Albright sold "Martin's Vibroplex" keys initially as an agent as there was no specific company at that time. Martin was not a businessman, he left that to Albright. Martin was the inventor and spent all of his time in the shop. Albright was successful in obtaining all applicable patents to the Vibroplex (if not already assigned to Martin) when he purchased the Mecograph Company in 1913. Afterwards, all "knock-offs" had to be licensed by Albright or the user could be held liable for "unlicensed use." The Vibroplex Company was officially formed in 1915 with J.E. Albright as president.

Martin left Vibroplex in 1920 when he was "bought out" by Albright for a little under $7000. Martin had a "non-competition" clause in the arrangement but continued to offer improvements to Vibroplex and after the ten-year period expired provided collaborations with other key manufacturers thru his sons' company, Martin Research & Mfg. Co.

Vibroplex continued on supplying bugs to telegraphers, hams and even the military. Demand for the J-36 was so high during WWII, Vibroplex enlisted the help of Lionel Corporation to build the quantity of keys required. The J. Bunnell Company also built J-36 keys during WWII.

In 1947, J.E. Albright passed the presidency of Vibroplex to his brother, W.W. Albright. John LaHiff had been with the company for many years and designed several keys, specifically the Lightning Bug and the Champion (and probably the Zephyr.) LaHiff became the new owner of Vibroplex in 1965. Upon his death in the early seventies, his son took over but he eventually sold Vibroplex to Peter Garsoe in 1978. Garsoe moved Vibroplex from New York to Maine where he had other businesses. Around 2000, the Vibroplex company was sold to Mitch Felton who moved the company to Georgia.

In 2009, Vibroplex moved to Knoxville, Tennessee, where they currently operate from. Besides a nice selection of Vibroplex models, they now also handle Bencher keys, W7FG Vintage Manuals, DX Covers, various types of antennae and many other ham items.


The Vibroplex Company

The Single Lever (aka: The Original)

Horace Martin's first all-mechanical, semi-automatic key design was the Single Lever. Almost all later "bugs" are based on this design that utilizes a vibrating pendulum to send a stream of dots the speed of which is determined by the placement of weights on the pendulum. The Original was called the Single Lever at first, then Horace Martin's Original and then just the Vibroplex Original (about 1940.) The example shown above in the Vibroplex Company History is from 1919 with the typical Japan Finish base with gold stripes. Most of the early Vibroplex key bases are painted with lacquer called "Japan Finish" and then gold pin stripes were added. Nickel plated bases were available. Very early keys were sometimes built with non-plated brass parts on Black Japan bases. Special paint schemes were first advertised in June 1929 (QST,) with paint colors available in Red, Blue or Green lacquer in addition to the standard Black Japan and Nickel-plate. Wrinkle finish came along around 1939, first in black. Deluxe Originals were introduced in 1940 with chrome bases, red knobs and jewel bearings. Then in WWII, to conserve chrome, the Deluxe versions used a dark gray painted base but the red knobs and jewel bearings were retained. Chrome base for the Deluxe returned post-WWII. Black wrinkle returned for the Standard for a short time after WWII but the company went back to gray (though a lighter shade) in the early fifties. Standard Originals are still available from Vibroplex.

Shown in the photo to the right is a typical, later type Original. The serial number is 147072 which was assigned in late-1945, probably post-WWII. It's generally thought that Vibroplex returned to black wrinkle immediately after WWII ended and the civilian market opened up. Looking at this key, it appears there might have been a slight delay before Vibroplex went back to black wrinkle. Maybe the delay was to "use up" the remaining gray paint. The Original sold for $15.95 in 1945.

1945 Vibroplex Original SN: 147072  post-WWII but with gray base


The Vibroplex Company

"Double Lever"


photo left: Early style with square cut out frame. ca 1912



photo right: Late style with "clover-leaf" cut out frame. ca 1918

The Double-Lever was the second all-mechanical, semi-automatic model to be offered with production starting about 1911. Although it's speculation, Martin probably designed the Double-Lever to have some other semi-automatic key design patented since the Single-Lever patent was still subject to several lawsuits from the Mecograph Company. Oddly though, Martin never patented the Double-Lever. However, Albright did purchase two later (1913) similar patents credited to Royal Boulter around 1915. The Double-Lever uses an abundance of small parts to achieve its function. There's no apparent advantage to the design or to the operation of the key but a Double-Lever will send nicely when in good condition and adjusted correctly. The wide spacing between the dot and dash paddle seems to have been designed for a fairly large "fist." Still, the Double-Lever does its job smoothly and one can send great Morse with this design.

The Double-Lever went through several changes during its production history. The Double-Lever shown to the left photo is the early style with the "Square Cut-out Frame." It probably dates from around 1912 (the serial number tag is missing.) The early style had a two screw clamp that allowed adjustment of the vertical placement of the lever on the trunnion axle. Later versions didn't have this feature with the trunnion axle being press-fit into the lever. However, like most bugs, the trunnion bearings can adjust the height placement of the lever within the frame in either design. The Double-Lever shown on the right is the last type made, called the "Clover-leaf Frame" because of the inside cut-out shape of the frame. It dates from around 1918 (SN:64103.) Note that this later key has a damper like the Single Lever Original. The Clover-leaf also has the dot lever stop mount cast as part of the frame instead of a separate piece as on the Square Frame. As can be seen in either of the photos, the dash lever mechanism is completely separate from the longer dot lever and pendulum. The Double-Lever was available from about 1911 up to about 1926.

With both Double-Levers, note that most of the screws are fillister-head steel machine screws. Both keys were originally nickel-plate on all brass parts, however the steel screws were left "unplated." Note that both keys are missing the shorting switch lever. The early key has the stationary contact but not the lever. The late key is missing the entire switch. If the key was used later in its life as a "radio" key, the switch lever might not have been needed and was removed (they are handy for "tuning up" however.)

The early Double-Lever was an inherited item from my old friend, W7TC. I don't know where or when Tom found it. The late Double-Lever was obtained in a trade with ham acquaintance (I traded a Heathkit SB-200 for the key.) I was told that this key had belonged to the ham's father but any further details were unknown.

Square Cut-out Double Lever Rebuild - I'm not a fan of restoring keys. Generally, they should be left in original condition. That is, if the key's original condition is complete and unmodified. This early Double Lever (D-L) had problems galore (see photo below.) First, it was missing the tag. Second, a former owner apparently thought the D-L didn't send fast enough so he cut the pendulum rod to shorten it and remounted the damper assembly forward by about an inch. This required drilling a new hole but the damper mounting also utilizing the rear bumper mounting screw. Another former owner repaired the pendulum rod by soldering an extension to it and then remounted the damper assembly back to its original location. For some reason a large gauge stranded copper wire was soldered to the two levers and to the dash lever stop - probably to improve the lever grounding. Many original parts were missing and replaced with anything that would work including using modern screws. Needless to say, this D-L had put up with a lot of abuse over its lifetime. Since I probably couldn't really do much more damage to the D-L, I decided to rebuild it as much as possible.

First, was complete disassembly to sort out all of the original parts and see what needed to be replicated as far as screws, thumbscrews and other "Vibroplex" type parts. The lever trunnion axle was severely bent, so that needed to be straightened. All of the fillister-head screws were steel (which apparently is original) but these were "rust darkened" and most had gnarled slots. I could tell from inspection that the brass parts were originally nickel-plated.  >>>

>>>  Unfortunately, a few of the replacement parts were going to be from "junk" Vibroplex keys that had been parted-out. Some of these parts were chrome-plated which looks different from nickel-plating. I was going to see if the chrome parts would not be too noticeable with the other parts having new nickel plating. I repainted the base with a few heavy applications of nitrocellulose lacquer. I had to patch the non-original hole from the damper remount job before painting. Since the tag was missing and this was only a rebuild, I didn't try to paint the pin stripes.

The lever pendulum was repaired by correcting the solder joint and shaping the repair to blend with the original part of the pendulum. The complete lever was then nickel plated. The damper wheel wasn't original, so a donor damper supplied a Vibroplex wheel. The chrome replacement parts were conditioned to look aged by "dulling down" the chrome with 600 grit AlOx paper. I remove just enough chrome for the brass to just begin to show. This results in the chrome looking more like nickel plating. A few replacement fillister-head blade machine screws had to be found by going thru the parts box. Since all of the original screws were steel and they had to mount in nickel-plated brass parts, I deep-cleaned and polished the steel screws to look somewhat new. Reassembly was very easy since I had the "clover leaf" D-L to use as a reference. Upon reassembly and adjustment the D-L now functioned superbly. The D-L was a good design that does send very good Morse. Lots of small parts though.

The photos below show the the "before" and "after" appearance.



The Vibroplex Company

Direct Point  aka: Model "X"

In 1911, Martin introduced the Direct Point, later called the Model X. It was the third style of "bug" offered. The Direct Point was based on the later of two patents submitted in 1911 that were designed to achieve the goal of a single contact or direct point key. By why was a single contact important? According to the June 1911 advertisement that introduced the Direct Point, the key duplicated the action of a typical hand key used by the best operators. The ad continues stating that the Direct Point is approved for use on lines where the Single Lever or Double Lever wasn't. This implies that some lines thought that the dual contacts of the Single or Double Lever keys could cause errors in sending. Certainly, another reason was that, like the Double-Lever, the Direct Point-Model X was also another design that allowed Martin-Albright to still have a semi-automatic key patent that could be marketed just in case one of the many lawsuits over the Single Lever patent didn't go in Martin's or Albright's favor. Albright was successful in purchasing Mecograph in 1913  which then freed the Single Lever from further patent litigation. The Vibroplex Company was officially formed in 1915.

The Direct Point-Model X is overly-complicated using a multitude of small parts. The dash function relies on one pivoted lever contacting and moving a second pivoted lever. The dash adjustment screw's position is critical for proper dash operation. Also, there's a fiber pad insulator between the dash lever and the sending "hot" contact. Usually, a Model X will achieve dots very smoothly but dashes will be more difficult to send easily or rapidly depending on the key's mechanical condition and how clean the moving parts are.

As with all of the early Vibroplex keys, the Model X uses many fillister head steel screws and also round head steel machine screws. None of the steel screws are nickel plated but all brass parts are nickel plated. The Model "X" shown above is an early one from 1912 (SN:10551.) The serial number isn't located on the tag but is stamped in the nickel plated strip that connects the "hot" terminal to the single contact post. The "X" was available from about 1912 up to about 1922. Selling price was $10 in the initial 1911 advertisement but the ad stated that the price would soon increase to $12. This Model X was donated to WHRM many years ago by my old friend W7ZCA(SK.)


The Vibroplex Company

Blue Racer (aka: No. 4)

The Blue Racer was introduced as a small key to save space for the busy telegrapher. The base is much smaller than the Original and the mechanism proportions had to be reduced somewhat resulting in a pendulum that is shorter than those found on the larger keys. The slight shortening of the Blue Racer pendulum makes the key a very fast sender. About the slowest a Blue Racer can send is 25wpm using the standard weights provided.

The Blue Racer was introduced in 1914 as the No. 4 Vibroplex. The first models had a "square opening" bearing support frame. The damper was a "U" type base that supported a loosely mounted wheel to act as the damper. The Blue Racer name was attached to the No. 4 around 1920. From 1914 up into the 1920s, the No. 4 base was painted Cobalt Blue enamel. Around 1920, the "clover-leaf" frame was being used. By the mid-twenties, Black Japan and Nickel bases were offered. Late in production (1950s) the damper assembly was changed to be like the Original (see Deluxe Blue Racer below.) Black wrinkle came in around 1939 and by the 1950s, light gray wrinkle became standard. The Blue Racer was also available as a Deluxe model with chrome base, jewel bearings and red knobs.  >>>
>>>  The "Racer" shown above is serial number 97296, dating it to 1926. It has the "clover leaf" frame cut-out and has the Black Japan finish with gold pin stripes. Interestingly, the address on the tag is 796 Fulton St. in Brooklyn. Most tags will have addresses that are on the 800 block on Broadway St. in Manhattan. For some reason, some early bugs will have the Fulton St. address. It's thought that some (maybe all) of the keys were actually built at a Vibroplex shop that was located in Brooklyn but that the keys were actually sold thru the main office in Manhattan (Broadway address.) Vibroplex never used the Fulton St. address in any of their advertising. Another interesting observation is that the J. H. Bunnell Company was located at 215 Fulton St.

There was a time period from 1932 up to 1941 where Vibroplex never advertised the Blue Racer. It's thought that perhaps the "Racer" was out of production during this time period. Perhaps when the Martin Junior production ended, the "Racer" was re-introduced to allow Vibroplex to still offer a small base key. When "Racer" production started again, these later keys have the Black Wrinkle finish base and the return to the square cut-out in the frame.

Shown in the photo to the right is a Blue Racer from 1944 with the serial number 128406. Note that it has the straight cut-out in the frame and has a black wrinkle finish to the base. Shown in the photo below is serial number 137766, assigned in early 1945. These "Racers" are how the keys looked from about 1941 up to the early fifties when the base paint went to gray wrinkle finish.   >>>

>>>  So, who was buying Blue Racers during WWII? One has to remember the increased traveling that was done by rail during WWII with soldiers and sailors being transported to various bases on both coasts and throughout the country. Then there was all of the increased shipping by rail that was necessary because of the war. Certainly the railroads had to increase their communications ability and much of that communication was by telegraph. The increase in railroad telegraph operators probably accounted for most of the Blue Racer purchases. Then there was the various government users, various commercial shipping users and anyone else that needed a small, fast bug. Hams were only able to operate during WWII by special permission from the Navy and then their transmitters had to be registered with the Navy and operation was only allowed on weekly "emergency nets" associated with civil defense. Still, it's possible that a ham might have purchased a Blue Racer during WWII (though it probably required permission from the War Production Board.) The Blue Racer was the same price as the Original, $15.95 in 1945. Blue Racer production stopped entirely in 1962.

It's rare to hear any bug being used "on the air" today in this age of electronic keyers or computer generated CW being sent from a keyboard. In the past few years I've heard mostly J-36 keys being used because of their military connection. I've never heard a Blue Racer being used, mainly because they are such a fast sending key. If you did call "CQ" using a Racer, no one would answer you. I did use my Deluxe Blue Racer when I used to have a regular CW sked with W7TC (SK,) who was an ardent bug collector and great CW op. We used to see how fast each of us could send and copy and we were always trying to "out do" each other. We had our sked on 3.507mc at the bottom of the 80M band. Since it was a sked with a person that I knew, I could "get away" with using the Racer.


The Vibroplex Company

The "Junior" and the "Martin Junior"

In September 1921, Vibroplex began advertising the new "Improved Vibroplex" that featured "Reduced Size and Weight" along with larger contacts but with the same quality parts as the Original. It seems that the Original was still available on its standard base but also available was the "small base Original" that became unofficially known as the "Junior." The "Junior" was sold throughout the twenties. It may have been dropped from production when the Blue Racer production was also stopped because of the Depression (1932.). For a short time, Vibroplex didn't offer a "small base" key as neither the Junior nor the Blue Racer seemed to be available. Apparently due to market-demand for a small-base key, Vibroplex reintroduced the old "Junior" in 1934 but it was renamed the "Martin Junior." The new Martin Junior was the same as the earlier "Junior" keys with the exception of the higher serial numbers (serial numbers must be used for proper identification of which advertised version the suspect key happens to be.) In 1937, Vibroplex began to reuse the "Junior" name for a short time. By 1939, the name became "Vibroplex Junior." Production of the "Junior" stopped for good in 1939. Bases are generally black japan with gold pin stripes or nickel plated. It might be possible that a few very late Martin Juniors were produced with black wrinkle bases. Shown to the right is a Vibroplex Junior from 1922 (SN 85207.) Of particular interest is the tag mounting. Note that the tag is oriented with the bottom of the tag nearest the connection terminals. The Martin Junior shown in Wm. Holly's Vibroplex Co. book also has the tag mounted this way. In fact, all of the Junior's I've seen have their tags mounted this way. All other Vibroplex models mount the tag with the top of the tag nearest the connection terminals.

1922 Vibroplex "Junior"  SN: 85207


The Vibroplex Company

Lightning Bug  (aka: No. 6)

The Lightning Bug started out as a "No.6" model in the mid-1920s. It was designed to use easy- to-machine parts for assembly of the bearing support frame which, on the Original and Blue Racer, was time-consuming to machine. Though several parts are necessary to build-up the bearing support frame they are made up of easy-to-machine round stock, flat sheet metal pieces and screws. Additionally, the damper support frame was also designed to use easy-to-machine parts. All of this was to allow the selling price to be somewhat less than an Original or Blue Racer. It must have been successful since the Lightning Bug was in production from the mid-1920s up into the late-1970s.

The Lightning Bug can be found in several finishes from Black Japan or Red, Green or Blue lacquer to Black Wrinkle, Gray Wrinkle and Chrome plating (or earlier Nickel plating.)

Shown is a Black Wrinkle finish Lightning Bug from the first part of 1942 (sn: 119102.) The Lightning Bug sold for $13.95 in 1945.

The Lightning Bug was designed after Martin had left Vibroplex. John LaHiff is usually credited with the design of the No. 6, aka: Lightning Bug.


The Vibroplex Company


The Champion was introduced late in 1939 as a low-cost alternative to the Lightning Bug. The Champion was built along the same lines as the Lightning Bug using the stamped sheet metal parts for the frame top and bottom along with the easy-to-machine round stock all assembled with machine screws. To further reduce costs, the Champion used the stamped and bent sheet metal "U" shaped damper support with the round stock damper as was normally inverted and mounted on the cross-bar of the Lightning Bug but instead merely mounted the "U" support rightside-up directly to the base. This simplified the entire damper down to just a few parts.

The Champion went through the same evolution with black wrinkle paint used on the base before and just after WWII, then going to gray wrinkle paint in the 1950s. The triangular shaped paddle was rounded starting in the 1950s, although Deluxe Original Keys had the rounded paddle much earlier (in red) as did the J-36 version of the Lightning Bug. The Champion was available up until the company moved to Maine (1978.)

The Champion was designed by John LaHiff, who went on to be the owner of the Vibroplex Company in 1965. Shown to the right is a WWII-vintage Champion with the triangle shaped paddle and the black wrinkle finish paint. The Champion was $9.95 in 1945, a real bargain.


Signal Corps U.S. Army - Key Type J-36

(based on Vibroplex's Lightning Bug)

Vibroplex, Lionel, Bunnell


During WWII, many items needed for the war effort were built under contract. This meant that a common design and specifications were used that might actually be the property of another company but the construction was actually the work of a contract company. Such is the case with the very popular Signal Corps bug, the J-36. The key is actually based on the Vibroplex "Lightning Bug" with some minor changes to the paddle and to the identification tag.

Vibroplex made J-36 keys for the Signal Corps before and during WWII. The photo to the left shows a Vibroplex J-36 from a pre-WWII contract (5-4-40.) Bunnell also made J-36 bugs during WWII. The Australian company Buzza also made a J-36 look-alike during WWII (see photo and info on the Buzza further down this page.)  >>> 

>>>  The Lionel Corporation certainly made the largest quantity of J-36 keys and most of the examples found today are the Lionel versions which were all built during WWII. The plastic identification tag on all Lionel J-36 bugs is always in poor condition with the example shown in the photo to the right being typical of the "better" condition tags (at least it's there.) The plastic was prone to shrinkage and usually pulls away from the mounting pins and breaks. A lot of J-36s are missing their tags entirely. Fortunately, repro tag artwork is available online. Artwork for the Lionel tag is at  proper sizing, printing and plastic lamination will be required.

J-36s are great keys to use and provide good action and precise sending. Most J-36 keys will require some rebuilding to function at the level the design is capable of. The Lionel J-36 shown to the right belonged to W3ON.

As mentioned above, just about the only bug I've heard being used "on the air" in the past few years have been J-36 keys. Their military connection has provided a place to use a J-36 on some of the vintage military nets that allow some CW operations. The Vintage Military Radio Net, operating on 3.974mc, allows our "73 round" to be sent in CW if the operator has the equipment and wants to exercise his fist.



Vibroplex "Deluxe" Bugs

The Vibroplex Company

Deluxe Original

Vibroplex began offering the Deluxe Original in 1940. The chrome plated base with red knobs and jewel-bearings made for an impressive key. Early versions appear to have a standard upper bearing adjustment screw on the top of the frame but this is actually a jewel bearing that has the jewel mounted in the bottom of the screw. The bottom bearing is also the jewel type. Note the copper braid for grounding the lever since it isn't grounded through the jewel bearings. Around 1948, the upper jewel bearing was changed and thereafter mounted from inside the frame. A hex-sided shape allowed tightening the upper bearing assembly into the frame. The bottom jewel bearing was still adjustable and still had a locking screw at the back-bottom of the frame. Since the top bearing wasn't adjustable anymore, the hole in the top of the frame was covered by a small, pressed-in, red plastic "button." Around 1950 the terminals' thumb nuts became domed thumb nuts. The Deluxe Original has pretty much remained in the line-up throughout the many later owners of Vibroplex. It's currently available from Vibroplex and comes with all of the features that made it a "Deluxe Original."

Chrome Base Dermatitis - Many of the Deluxe models suffer from pitting in the chrome plated base. Since the base was steel, it had to be copper plated first, then nickel plated and finally chrome plated. If any contamination was present on the steel surface, especially common in very small surface porosities, the plating process would be compromised at those small points. Most of the time the areas were so small they went unnoticed. After long-term exposure to a very humid area, especially when stored in an unheated shed or garage, corrosion begins at the small pin-point areas and it develops over time (under the chrome plating) into the condition as seen in the photo upper right. There is no cure for this condition. Either the base has to be re-chromed or, an easier solution might be to find a "parts key" that has a good condition base. Vibroplex did vary minor things like the type of hardware or insulation material but, usually everything is interchangeable.

SN: 146274 had chrome dermatitis - see upper photo right. It took a while but eventually I was given a junk Deluxe Original - incomplete and consisting of many incorrect parts. But, the chrome base was in good shape. The key was from 1961, so the hardware was philips head screws and plastic insulators. I stripped both keys and then rebuilt SN:146274 using all of the original 1945 parts except for the base, frame and damper. These parts on the original were severely pitted. When reassembling the key, the only difference in mountings were the damper originally was mounted with round head machine screws while the later key mounted the damper with flat head countersunk screws. I did remount the 1945 tag to the replacement base. The resulting rebuilt key, while basically a "parts key," now appears to be a fine condition, early Deluxe Original (since only vintage parts were used) and it functions as it should - very fast.

SN: 146274 as it originally was found with a severely pitted base

1945 Deluxe Original SN: 146274 after rebuild. All original parts except base, frame and damper


The Vibroplex Company

Super Deluxe Original "Presentation"

The Super Deluxe Original "Presentation" model was introduced in 1948 and featured the Deluxe Original with its usual chrome metal parts, red knobs and jewel-bearings along with the addition of a 24K gold-plated sheet metal cover that was mounted to the top of the chrome base. All Presentation models used the newer style jewel bearings in which the upper bearing screws in from the underside of the top of the frame and then the lower bearing is adjustable. Since the upper bearing wasn't adjustable, a red plastic button was inserted into the threaded hole.

To really add something special to the Presentation, Vibroplex introduced the "New Super Speed Lever" and it was only available on the Presentation. The New Super Speed Lever provided an adjustable-length main spring that allowed a wide-range adjustment of the speed of the dot stream. Two screws on top and two screws on the bottom of the slotted, rectangular end of the lever that secured the flat main spring within the slot.   >>>

>>>  By loosening the two top screws, the flat main spring could be extended longer by pulling the lever weight rod which then pulled the main spring out of the slot further. The longer the main spring the slower the dot stream that was produced. Or, if the lever weight rod was pushed in, the main spring length was shortened and the dot speed was increased. Once the desired dot speed range was found the two screws could be tightened to secure the main spring at that length. The regular lever weights' position were the fine adjustment of the dot speed (as with any of the bugs.) In essence, the Super Speed Lever offered a wider range of dot speed adjustment. Apparently, the Super Speed Lever wasn't that big of a success and, sometime in the mid-sixties, it was dropped from production. After that, the Presentation became just a Deluxe Original with a gold-plated top cover. The Presentation shown is about thirteen years into the manufacturing of this version and this example still has the Super Speed Lever. Its serial number is 218826 dating it to 1961. The Presentation is still available from Vibroplex and it still comes with the 24K gold plated top cover, chrome parts, red knobs and jewel bearings.

This Presentation was found in its original cardboard box. Shown below is the original instruction card (also found in the box) describing how to adjust the New Super Speed Lever (only on the early versions of the Presentation.)


The Vibroplex Company

Deluxe Blue Racer

Probably the most beautiful of the Vibroplex Deluxe models, the Deluxe Blue Racer has just the right proportions that endear it to owners and collectors alike. The Deluxe version of the Blue Racer was available from the late forties up to about 1962. A great key to use and very fast.

To get an idea of the small size of the Blue Racer base, note the size relationship of the knob and paddle to the base when compared to the Deluxe Original or Deluxe Lightning Bug.

I used this Deluxe Blue Racer in skeds with W7TC(SK) back in the early-1990s. We would always try to push the send and receive speed up as fast as possible and still get some kind of copy. Since we knew each other, we could "get away" with that sort of thing.

The Deluxe Blue Racer is once again available from Vibroplex.


The Vibroplex Company

Deluxe Lightning Bug


Like the Original and the Blue Racer, the Lightning Bug was available for a time in the "Deluxe" style with chrome plated base and red knobs. Like to Original and Blue Racer Deluxe versions, the Lightning Bug Deluxe also had jeweled bearings. The Deluxe Lightning Bug shown is very late in production - from around 1974 - serial number is 379143. By this time, shorting levers had become optional items so this key is not equipped with a shorting lever. Interestingly, the metal tag is not attached to the base with drive screws - it's glued to the base! Lightning Bug production stopped when the company moved to Maine in 1978.


The Vibroplex Company

Deluxe Lightning Bug


The Deluxe Lightning Bug shown to the left is an earlier key, dating from 1958. Note that this key has the shorting lever. The other interesting feature on this key is that the first owner's name is engraved on the top of the base - "Jerry R. Washburn." Vibroplex did offer name engraving as an option at one time.

This key was owned for many years by W7TC (SK) who had purchased it "second-hand" from one of the many ham radio dealers around in the 1970s. "TC" and I had a weekly CW sked on 80M where he would always use this Lightning Bug and always I used my Deluxe Blue Racer. 


The Vibroplex Company

Deluxe Vibroplex Iambic Keyer

As electronic keyers became popular, there was an increase in the demand for a keyer mechanism to use with the electronic keyer. Vibroplex came out with their keyer for electronic keyers in 1960. It was only available in standard finish. In 1962, both Deluxe or Standard finish was available. At first these "keyers" were the standard "knob and paddle" arrangement that more or less allowed the user to move from semi-automatic keys to full electronic keyer with the formation of the dots and dashes accomplished in the electronics. The "side-to-side" action was more-or-less the same as the bug except that dashes were completed for you by the keyer electronics.

As the electronic keyer evolved it was thought that another function could be added. By having two separate levers that would allow both dot and dash contacts to be closed simultaneously a sequence of alternating dots and dashes could be sent. This actions could be used to make character formation take less physical movement. From this the "squeeze" action developed and the key mechanism was called the Iambic Keyer. The versatility of the Iambic Keyer is that it's not only a "squeeze key" but it can be also used as a "side-to-side" Keyer with no modifications.

In 1978, with new owner Peter Garsoe, Vibroplex was moved to Maine and all of their machining equipment was updated or rebuilt. At this time, Vibroplex came out with an Iambic version of their keyer. Two other versions called "Brass Racer" were introduced later. Vibroplex still produces the Iambic although its appearance is somewhat different.

Deluxe Iambic Keyer - this version was built in Maine


Vibroplex Carrying Case(s)

There was a time when being a telegrapher was an important profession. The telegrapher at the local railway station provided communications outside of many small towns and others, like Western Union or Postal Telegraph ops on the lines or other ops via radio, provided world-wide communications via American Morse (landline) and International Morse (radio) Code. As a professional, the telegrapher usually had his own key - mainly because most railway stations would have only provided a simple straight key bolted to the table. The telegrapher would take his "bug" to work as any craftsman would bring his tools. A delicately adjusted Vibroplex would not be carried around in your lunch pail, had to have the official Vibroplex Carrying Case. These cases were available from Vibroplex, usually for around $5.00. All of the carrying cases are wood covered with leatherette. Early versions are lined with green mohair and later version are lined with green felt (black is sometimes also found.) A leather carrying handle was provided. Initially, the cases were designed to fit the particular key it was to house. Blue Racer cases were somewhat smaller than cases for the Original or the Lightning Bug. Most cases open on one end although there are some seldom-seen examples that open from the top (maybe for Presentations?)

Although it's always nice to have a couple of Vibroplex Carrying Cases, they do present display problems. If a bug is inside, it can't be seen. If you have the door open to see the bug, the door swings open to the right. If you have a bug on the right side of the Carrying Case, the door blocks viewing that bug. You can't have two Carrying Cases next to each other with their doors open. Just some observations,...Carrying Cases are nice to have,...but they aren't easy to display.


Speed-X Radio Manufacturing Co., Speed-X Manufacturing Co., Speed-X (E. F. Johnson Co.)

Speed-X Radio Manufacturing Co.

Stewart Johnson

The Speed-X name is first associated with Electro Manufacturing Co. located in Fresno, California. In 1934, Stewart Johnson bought the Speed-X name and relocated the company to San Francisco. Johnson changed the name of the company to Speed-X Radio Manufacturing Company and the address was 30 Ninth St. in San Francisco. Johnson built Speed-X keys from 1934 until he sold the company to Les Logan in 1937. The Speed-X shown in the photo is similar to the later model 515 Speed-X but with a somewhat smaller base. Earlier Speed-X bugs will have the combination of knob and paddle but the later Speed-X bugs use two paddles instead. Although there is no identification on this bug, it was found in unused condition in its original Stewart Johnson Speed-X box.


Speed-X Radio Manufacturing Co.

Stewart Johnson

This is another Stewart Johnson Speed-X bug. This one is nickel-plated and, typical of the Steward Johnson versions, this one doesn't have any sort of identification. However, one can see the similarities that this key has to all Speed-X bugs and particularly those built by Stewart Johnson. Also, a help in identification and dating this key comes from its former owner, Al Norberg W6HLJ, who owed the key from the 1935 until recently. Since this key was used with Norberg's homebrew transmitter that he built in 1935, this key more than likely is a Stewart Johnson version Speed-X. At 97 (2013,) Al Norberg donated his Speed-X key to go along with his homebrew transmitter that he donated to the museum several years ago.

For more information on Al Norberg's homebrew 1KW transmitter built in 1935, go to our "Classic Pre-WWII Ham Gear" page for a complete write up that includes two B&W photos taken in 1936 showing the transmitter, homebrew receiver and this key. Navigation link below.


Speed-X Manufacturing Co.

Les Logan

Model 500

Les Logan purchased Speed-X Radio Manufacturing Co. from Stewart Johnson in 1937. Logan dropped "Radio" from the name, changing it to Speed-X Manufacturing Company and the location was moved to 646 Jessie St. in San Francisco. Les Logan's name is usually associated with Speed-X from 1937 up to 1947. Logan changed a few things on his keys compared to those of his predecessor (Stewart Johnson.) Logan finally added an identification tag to his keys along with a model number. Logan's bugs use two paddles rather than a knob and paddle combination. He also offered a couple of different types of bearing support frames on his different models. The "T" handle was available on the larger Logan bugs and supposedly allowed the user to set the bug on its side and use the dash paddle as a straight key. Les Logan's bugs were well-built and quite popular. Les Logan sold the Speed-X line to E.F. Johnson Co. of Waseca, Minnesota in 1947. This Model 500 belonged to John Ridgway W3ON.


Speed-X Manufacturing Co.

Les Logan

Model 501

Les Logan's Speed-X Model 501 was the nickel-plated version of the Model 500. Dates from the late-thirties. 


Speed-X Manufacturing Co.

Les Logan

Model 510

The Model 510 was Les Logan's small key that was priced well-below the larger 500 models. As a cost cutting measure the base of the 510 is made out of "pot metal." This makes the bug very light-weight although that probably wasn't the intention. Luckily, by the mid-thirties the process for casting pot metal had improved dramatically from types of castings found a decade earlier. The pot metal base of the 510 is in very good condition although there is some very minor cracking along the bottom edges. While noticeable, the pot metal isn't fracturing or showing any other signs of "pot metal disease" otherwise known is "stress corrosion." For an example of how pot metal of the mid-twenties behaves, take a look at the "73" Bug further down this page. This Model 510 came from K6QY.


Speed-X Manufacturing Co.

Les Logan

Model 515

The Model 515 was Les Logan's big seller. It's the standard key that was probably priced very competitively and therefore became very popular. The Model 515 was about the same size as Vibroplex's Blue Racer but, unlike the Racer, the 515 can send fairly slow Morse. The reason is because of the longer main spring used. The main spring is the spring-blade that connects the pendulum rod to the main lever. The thickness and the length of the main spring will determine the flexibility of the pendulum and therefore the slowest sending speed that can be achieved with the given weights. This Model 515 belonged to W6EYC.


E. F. Johnson Company

Speed-X  Semi-Automatic Key

CAT. NO. 114-501

E. F. Johnson Company of Waseca, Minnesota became the last manufacturer using the Speed-X name. Johnson purchased Speed-X from Les Logan in 1947 and initially continued to produce basically the same type of keys. Eventually, a different weight design was used followed by a change in the fiber paddles to plastic. The last of the Johnson Speed-X bugs have chrome plating, different tags and other minor hardware changes. The bug shown probably dates from the early 1950s. This bug belonged to K6QY.


E. F. Johnson Company

Speed-X  Semi-Automatic Key

CAT. NO. 114-500

The Cat. No. 114-500 was the standard version of the plated bug shown above. The base and frame are painted black wrinkle finish and the hardware is chrome plated. This Speed-X key was found in its original box in unused condition - the two paddles weren't even mounted to the lever. What was interesting was where I found the key. I always have made it a point to go to the Hot August Nights annual car swap meet held in Reno. I even went to it when it was called Harrah's Auto Swap. Hot August Nights has always seemed to produce something radio related over the years. I've found several telegraph keys there many times. Well, this Johnson 114-500 was at HAN swap probably around 1995 or so. I had actually been through the entire swap and was standing beside a table that I thought I had already looked at. I was thinking if there was anywhere else to look in the swap area. I happened to look directly down at the table that I was standing right next to and I saw a familiar-looking orange box with a blue label. I wondered if the bug was actually inside. I was amazed when opening the box I found that the bug was untouched, never used, in mint condition. I didn't even have to ask the dealer what the price was, he came over and volunteered that information. Money quickly exchanged hands ($30) and I had the bug.

At home, I mounted the paddles with the hardware provided in the box. Unusual that the bug was never used and is still pretty much that way.


E. F. Johnson Company

Speed-X  Semi-Automatic Key

CAT. NO. 114-520


This is Johnson's version of the old Les Logan Model 515. This particular example has the later plastic paddles installed. Also, note the phillips head screws. This bug probably dates from the late-fifties up to the mid-sixties.


McElroy Manufacturing Corp., aka: T. R. McElroy "World's Champion Radio Telegrapher"

Deluxe Model MAC Key

Ted McElroy was a champion radio telegrapher having gone through the Candler system of learning International Morse code. His receiving speed was advertised as 55wpm in the mid-thirties but ultimately Ted was clocked at over 70wpm.

McElroy's connection with high-speed CW led to his forming a company that specialized in various types of code equipment manufactured between the mid-thirties thru WWII and for a short time after the war. Ted's company seems to officially have been "McElroy Manufacturing Corporation" (officially formed in 1941) but most of his earlier telegraph key name-plates will have "T. R. McElroy - World's Champion Radio Telegrapher - Boston Mass." as the company name. Sometimes "MAC" also appears on the name-plates. Around 1955, McElroy sold his business to Telegraph Apparatus Corp. (T.A.C.)

In 1937, McElroy began producing the MAC key. It used a heavy cast iron base that featured a "T bar" frame. Supposedly, the key could be turned on its side and used as a hand key. The damper utilized a loosely mounted thick metal disk and arm that was adjustable in height. The MAC keys were available in black wrinkle finish and the Deluxe versions had a "marble" finish.


The metal identification plate on the Deluxe Mac Key reads:

Radio Telegraph Transmitting Key
(Deluxe Model Mac Key)
Mfd. by
Theodore R. McElroy
World's Champion Radio Telegrapher
Boston, Mass, USA
Speed Key Serial No. 1377 

Some of the Deluxe MAC keys will have a dot-spring pre-load installed. This adjustment would "load" the dot spring to have more "stiffness" and reduce contact bounce. The Dot Spring Pre-Load is shown in the close-up photo to the left. Note that the rod is adjusted to slightly compress the spring which will reduce its flexibility making the dot contact less likely to bounce and result in more precise dot streams.

The Deluxe Mac Keys were made in this style with the metal identification plate from around 1937 up to about 1940.


DeLuxe Model 600

The Deluxe Model 600 shown features the same type of "marbled" finish that was found on the earlier versions of this key. The marble finish resulted in a key that was striking in appearance and the finish was very durable.

This version of the Deluxe MAC key started to be produced around 1940. The decal labels replaced the large metal identification plate used on the earlier MAC keys. Also, the dot spring pre-load is usually not found on these later keys. The Deluxe Model 600 sold for $9.50 in 1940.

All of the McElroy MAC keys are heavy, well-built units. Key contacts are large and all of the hardware is heavy-duty. When in good condition and well-adjusted, the Deluxe MAC Keys have a comfortable action and can send CW very accurately.

McElroy also manufactured various types of hand keys (see the McElroy Stream hand key in the Hand Key section above.)


Model S-600 "Super Stream"

Ted McElroy's "Stream" keys featured a Zephyr-styled, "teardrop" shaped base that evoked the era of speed and rapid movement. Both the "Stream" hand-key versions and the "Super Stream" semi-automatic key used this style base. Introduced around 1941, the S-600 was chrome plated as were some of the "Stream" hand-keys.

The Super Stream was given the model number S-600 but it isn't located on the tag or anywhere on the bug. The name Super Stream doesn't appear on the tag either.

The Super Stream S-600 appears small in photographs but the key is quite large and very heavy which helps it stay in place when sending. It's a stunning key that, if adjusted properly, has a wide-range of sending speed and is comfortable to operate while providing a very precise dot-action. The fact that the key "stays put" on the bench really helps sending accuracy. Of course, any bug could be mounted to the bench with screws to keep it from moving around but the Super Stream S-600 does so just by having most of its weight at the front of the base. 


Other Bug Manufacturers

Ultimate Transmitter Company



Ultimate Transmitter Company was located in Los Angeles, California. Their semi-automatic keys were merely called "73." These bugs are very small and work by way of a bell-crank that allows actuating the vibrating pendulum from a right-angle mounted key lever. Adjustments are accessed inside the key mechanism after removing the metal cover. These keys were made in the 1920s and the patent date on this particular one is "6-23-25." Unfortunately for collectors, the "73" bugs were built on pot-metal bases with pot-metal upper cover and lower sub-base. During the 1920s, the pot-metal process was primitive and contamination of the mix affected nearly all pot metal cast products. The material degraded rapidly with a process called "stress corrosion." The result was warping, chipping, cracking, distortions,...on and on. Note the cover on the "73" bug shown to the right. Large chips are obvious and also note the cracking on the base and the stress cracks all over the top of the cover.

Almost all pot-metal made in the 1920s will today be found to be victims of stress corrosion. As can be seen, this example of the "73" bug is a victim of severe "pot-metal disease" that not only affects the top cover and base but also affects the pot metal sub-base that the key mechanism is mounted to. The distortion is not too obvious at the angle of the photograph but the "bent" sub-base doesn't allow the mechanism to be in alignment and therefore accurate adjustment is not possible and this means the key really doesn't send properly - or, at least as well as the "73" bugs did when they were new. 

Originally the "73" bug had two paddles to allow a good feel to the actuation of the mechanism. With the other problems this example has, the missing paddle seems minor. The key cable exits from under the sub-base and exits on the right side of the main base. Also, the shorting lever is on the right side of the bug. Several examples of the "73" bug seen on the Internet have painted exteriors. The sub-base on this example appears to have been painted black. The exterior shows no sign of paint but, given its condition, that's not surprising.

The "73" bug was a very clever design that probably worked very well when the keys were new. Unfortunately, the material used for their construction was not stable and that resulted in a short useful life for the key. That's probably why the "73" bug has a relatively "unknown" status today.




Brooklyn Metal Stamping Corp.


Brooklyn Metal Stamping Corporation was in business from 1930 up to the beginning of WWII. They were probably licensed by Albright-Vibroplex to build this "knock off" because many of the parts are identical to those built by Vibroplex. The "Speed-Bug" mainframe is an exact copy of the Vibroplex. The only significant non-Vibroplex features are that the vertical dot spring contact being "keyed" to only allow mounting in the odd vertical position and the elaborate spring-loaded ball contact damper. A minor difference is the longer main spring that results in a very slow speed with the single weight at the end of the pendulum. Normal sending speeds require the weight to be almost as far forward as the adjustment allows. The other minor difference is the use of a single paddle. I've seen one photo of another "Speed-Bug" with the single paddle but I've also seen a photo of another "Speed-Bug" with a knob and paddle. The "Speed-Bug" is fairly scare. Probably dates from the mid-thirties.


Buzza Products

Automatic Key No. 100


This Australian-made key is based on the Vibroplex Lightning Bug (or military J-36) design but changes the support of the dash lever by providing it with its own pivot and bearing. The damper also departs from the Lightning Bug design, requiring fewer parts. All No.100 Buzza keys have a red paddle and a black knob. A very heavy base makes the Buzza a sturdy key to operate and its dot action is very precise. Dates from around WWII.

Note that the lever and paddle on the Buzza have a slight bend to the left. Read about the next key, the Dow-Key Universal, to find out why.



The Dow-Key Company

Deluxe Universal "Rotary" Speed Key

Paul Dow began making bugs around 1942 in Winnipeg, Manitoba, Canada. Dow felt that the speed keys that were then available didn't offer any adjustability to the angle of lever, knob and paddle since all keys had this mechanism in a fixed-vertical position. In Dow's opinion, this made those speed keys uncomfortable to use for long sending sessions. Dow soon was producing a "Bent Key" that had the main frame mounted at a slanting angle to have the lever, knob and paddle at an angle that was hopefully more comfortable for the operator. However, the Bent Key's angle wasn't adjustable to individual preference. By 1949, Dow had patented his Universal "Rotary Key" that allowed full adjustment of the lever, knob and paddle position angle to either side from vertical. One could also adjust the vertical angle of the paddle. The complete adjustability of the Universal allowed the user to find the perfect "fit" for his (or her) sending hand.  The Dow-Key Universal was built in Winnipeg for a few years although the last advertisement in QST was in September 1951. Many early magazine ads show a Warren, Minnesota address along with the Winnipeg address. >>>

>>>    A few years later and the keys were carrying tags indicating they were made in Warren, Minnesota with Winnipeg listed as the distributor for Canada. Paul Dow retired in 1956, leaving the operation of Dow-Key to his son, Gordon. Paul Dow died in 1957 and in the same year, Gordon moved the company to Thief's River Falls, Minnesota. 1957 was also the last year that Dow Key made speed keys. The Dow-Key Company had been slowly changing and adding to the product-line with RF switches becoming their specialty. The Dow-Key coaxial relays are probably the best known to hams of these types of products. Dow- Key has had several owners but is still in business building various types of RF switching devices.

How it Works - The Universal Rotary Key uses a tubular, flanged housing in which the main lever is mounted. The trunnion bearings are adjustable both top and bottom. Once the main lever is mounted in the tubular flanged housing this assembly can be inserted from the backside though the vertical base mount and lightly secured with the knurled thumb screw. Then the red plastic retaining ring with dash contact mount is placed over the protruding portion of the flanged housing. The red plastic retaining ring is secured by lightly tightening the two philips head screws. To rotate the entire flanged housing and main lever the knurled thumb screw is loosened and the mechanism rotated to the desired angle and then the thumb screw lightly tightened to secure that position. Note that the dot contact is mounted with a clear plastic standoff on the backside of the flanged housing. Note that the connections to the dot and dash contacts are via flexible wires. This is to allow unhindered rotation of the mechanism. Total movement is about 270º with vertical being the halfway point. Though it's possible to rotate the mechanism all the way CCW and maybe use the dash contact side as a straight key, the mechanical limits don't allow rotation to a completely horizontal position. Besides, it was never the intent of the Universal to double as a straight key. A fully adjustable, comfortable-to-use, speed key were the design goals of the Universal.

The Deluxe Universal Rotary Key shown is from the very early fifties. It has a tag indicating that it was built in Winnipeg, Canada. The Deluxe Universal is a striking key with its transparent red plastic, transparent clear plastic and chrome features. The precise machining of the various pieces results in a very smooth rotation when adjusting the sending angle. The Dow-Key Deluxe Universal has a very wide range of speed and, since it can be set up to any angle of operation, it's the ultimate in sending comfort. I've tried different angles and Paul Dow was actually "on to something." For me, a slight angle CCW does feel nice. You do have to readjust the contacts slightly if the angle change is dramatic but it's not necessary for small changes. I've noticed that sometimes one will see a standard bug that has a slight "twist" in the front part of the lever (like the Buzza.) I guess that was one way to get a comfortable feel.


Electrical Specialty Mfg.

 "Cedar Rapids Bug"

Electrical Specialty Manufacturing started making bugs in 1936. The company was located in Cedar Rapids, Iowa which has resulted in their key being given the nickname "Cedar Rapids Bug." Electrical Specialty's methods of manufacture and their parts didn't change a lot over the years. Minor changes the damper design and in the cast base having four feet on early versions and five feet on later versions are the most often cited.  The rubber bumper on the damper is another unusual feature. The company name is cast into the bottom of the base. The Cedar Rapids Bug was perhaps the only semi-automatic key that was offered either in assembled form or as a kit, (the price difference was minimal.) Since many were assembled from kits, builders sometimes took liberties with custom paint jobs and special hardware. The example shown in the photo is the "standard" Cedar Rapids Bug (ca. 1947.) Electrical Specialty is still in business but they quit making bugs in 1957. 

NOTE: The paddle looks squared-off and unfinished but this is an original paddle and knob and shows how the standard models looked assembled without modifications. Of course, since these bugs were kits, original owners might have "shaped" the paddle to their preference or added other "custom" features to the bug.  


SKILLMAN (a.k.a. Calrad, Hi-Mound and many other names)


This bug was sold under many different names by several different dealers including many of the catalog dealers, like Lafayette or Allied. The Japanese company Calrad may have been the manufacturer but Calrad was noted for always putting different names on many of their products (Shield and Argonne were other alternate Calrad names used on other products.) The Calrad version was identified as "T.K.12" on the packaging but the plastic cover didn't have any name or identification. Other names found on these types of bugs included Hi-Mound (identified as "BK-100" with no name on cover,) Skillman and probably several others. Like many of Calrad's products, these keys are very well built. They also seem to function quite well although adjustments are a little hard to get at. With many versions, the plastic dust cover will not have any name present. Also, many of the plastic covers will be found in poor condition with cracks, broken pieces or even missing completely. Dates from the 1960s.  


Telegraph Accessories - Learning Tools

Victor Talking Machine Company

Marconi-Victor Course - Wireless Telegraphy

When the USA became involved in WWI (April 1917) the Army and Navy realized they were going to need wireless operators in the field and on ships at sea besides the trenches. Training time would be shortened if the men enlisting already knew International Morse Code. What better way to learn the code at home than by phonograph record. The Victor Talking Machine Company offered a six record set along with booklet in 1917 to assist the military in providing a method to have future enlistees already know the code. The records are 10" diameter and are acoustically recorded, that is, all the speaking and the code "buzzer" were performed before a large horn that directed the sound energy down to a record cutter that made the master. The sound of the transmitted code signals sounds like a rotary spark gap type transmitter but is probably a large mechanical buzzer. In the first record for learning the alphabet, the announcer yells "A" and then the buzzer is heard to send "dit dah" at about a ten wpm speed. Then the announcer yells "B" - "dah dit dit dit" from the buzzer. This same format is used for learning the letters and numbers. The records progress from learning the code on the first record and then on to building speed up to full messages sent on the last record.

Recordings have been used to learn International Morse for years after this Marconi-Victor course. Several companies issued records over the years. Many hams remember the Ameco Code Course records. When I was a teenager, I learned the code from an Ameco Code Course LP record that I checked out of the local library. The recording medium went to tapes and then CDs. Computer programs have also been instrumental in instruction and building code speed.

Learning to receive International Morse was certainly the most difficult part of the task. But, learning to send Morse and to be able to "handle a key" was also very important. It required tools like the following equipment.


Signal Electric Manufacturing Company

Wireless Practice Telegraph Set

These wooden board key sets (called KOB, key on board) were popular on land lines as methods of communication within large buildings or other similar applications. The early types had a hand key and a sounder that would allow sending and receiving along a local line interconnected with other KOBs and a voltage source. These early types were also used for learning and practicing American Morse or Railroad code within applicable classrooms. With the evolution of radio and its use of International Morse requiring the reproducer to work with "dots and dashes" rather than "clicks and spaces" the KOB units were also built with an electrically operated buzzer rather than the sounder. The buzzer allowed producing the "dots and dashes" of International Morse. The buzzer type KOBs were traditionally used for learning or practicing the code although it was possible to interconnect two or more sets for local wire communications. Most were interconnected and used in "radio schools" and military radio schools for classroom Morse send-receive education. KOB-type buzzer practice code sets were popular from the WWI era up to the fifties. Later types are plastic and are sometimes toys rather than actual learning tools as the R-68 shown was. The metal tag between the key and buzzer shows International Morse Code. The R-68 shown is probably from the WWII-era.  


Code Practice Oscillators

Insuline Corporation of America - Signa-Tone

Bud Industries - Audio Oscillator

Code Practice Oscillators were used for several purposes. First, when two or more people were trying to learn the code or were trying to improve their sending ability, the Code Oscillator allowed one person to send while the other received. The positions would be switched after a while to allow both individuals to send and receive. Unlike the buzzer practice sets, the Code Oscillators sounded more like a true CW signal (well, it depended on the oscillator) and probably made the transition to an actual "on the air" copy easier.

These Code Oscillators could also usually be connected to the ham transmitter to act as a sending monitor - to make sure that your sent CW had the proper spacing and rhythm. The tube used was generally a 117L6 which was a diode rectifier and pentode in one envelope. Usually the speaker was a Hi-Z armature-pin speaker. Most had the option of using a headset for monitoring. Pitch of the tone was adjustable.

Another use for the Code Practice Oscillator would be for those hams who would volunteer as examiners and would administer Novice exams and sometimes Conditional License exams. Obtaining a Novice License before 1980 required that the prospective ham to go out and find a licensed General Class or higher ham who would volunteer to give him the 5 wpm Code test. The first step was to for the volunteer examiner to obtain a 610 form from the FCC. Those forms used to have a section for the examiner to fill out confirming that he had given a 5 wpm Morse Code test to the applicant and that he had passed both sending and receiving. The requirement was to have at least one minute of solid copy and one minute of solid sending. Next, the volunteer examiner would send in the completed 610 form to the FCC. Six weeks later, the examiner would receive the applicant's Novice written test via the mail at which time he would contact the applicant to come over and take the test. The completed test was sent into the FCC again and hopefully, six weeks later, the applicant would receive his Novice license and call letters (again, via the mail.) This arduous and lengthy procedure started to change as the ARRL Volunteer Examiner program was started in the 1980s. As both the code test and the written theory test could be administered on the same date the time to acquire the license was reduced. Over time, the FCC has greatly improved their turnaround time on license processing also. Today, temporary license permits are issued upon successful completion of the exam, the new licensee will show up on the FCC website in a few days and the "hard copy" license can be printed from the FCC website..

Shown in the photo top right is the ICA Signa-Tone (ICA was the Insuline Corp. of America.) This is a very nice performing Code Practice Oscillator with a variety of tones and strong volume. The Bud Audio Oscillator is very similar in design to the Signa-Tone and dates from around the same time period - the late-forties to mid-fifties. Bud Industries is famous for their metal cabinets and metal relay racks. Bud Industries has been in business since 1928.


The Instructograph Company, Chicago, Illinois

The Instructograph

Using records to learn the code had one disadvantage. You were using a phonograph and probably couldn't use earphones, so everyone around got annoyed as they had to listen to you as you were learning the code. The Instructograph eliminated that problem. Most were designed to run into earphones. It could also operate an external oscillator for multiple student use. The Instructograph uses punched paper tapes to send code. The paper tape actuates a set of contacts when holes are present and break contact when there are no holes. The length of the hole determines whether a dot of a dash is sent. The paper tape is pulled through a "smooth button" on the actuator arm that moves the arm as the button drops into the punched holes. The actuator arm also has the contact that makes and breaks the circuit that drives the oscillator or other external sounding device. Early machines used a wind-up phonograph type motor while later versions used an AC operated electric motor. Early versions sometimes had a battery operated oscillator inside using a single type 30 tube. Some versions relied on an external oscillator. Later versions had built-in solid state oscillators. The paper tapes were available for either American Morse (landline or railroad code) or International Morse (radio) code (Instructograph always referred to International Morse by the name Continental Morse.) The tapes were kept in individual boxes or metal tins. Usually a larger box was provided for tape storage and instructions. The paper tapes progressed from learning the alphabet and numbers on up to full messages for building your speed. And, of course, the speed of the machine was adjustable so you had complete control of how fast you wanted to have the code sent to you. Since the paper tapes opened and closed contacts any variety of external signal indicators could be used for learning that particular type of code - from lamps for visual indicators to sounders and batteries for American Morse (in addition to the audio oscillator for International Morse.)

Shown in the photo to the right is a fairly early Instructograph that uses a wind-up motor to drive the tape pickup spool. Note that one this early version, the tape spools are made of wood. Also, the tape containers are metal tins with "Continental" printed on the lid. Each tin is numbered for identification. Note also that this machine has a small pointer knob at the upper left of the panel. This is the power switch and volume control for the battery-operated audio oscillator that is mounted inside the cabinet. The oscillator uses a single type 30 vacuum tube. This excellent condition Instructograph is complete with all of the tapes, extra spools and a spare type 30 tube. It belonged to W3ON.

Instructographs and the FCC at San Francisco - Instructographs used to be everywhere. A lot of hams had them. Even the FCC used them to give the code tests to hams. The 13 wpm code test I took from the FCC in San Francisco in 1970 was sent with an Instructograph machine. When administering the code test, the FCC engineers would deliberately try to increase your nervous apprehension and level of discomfort to see if you really "knew" the code and could copy under difficult conditions. Typically unfriendly, the SF-FCC engineers communicated to ham-test, license upgrade-applicants with terse verbal commands along with various facial expressions that were supposed to highlight the dubious likelihood of any applicants passing the CW test. If you did pass the SF-FCC CW test, you could copy CW in the worst environments.

In contrast, in the late-eighties I took (and passed) the 20 wpm code test for Extra Class. The CW test was sent using a cassette tape machine by a VE (volunteer examiner) who did everything he could to increase the comfort level and reduce any test nervousness. "Do you need a pencil? Is the volume okay? Would you like a cup of coffee?," were some of the questions designed to reduce "test nervousness." Quite a difference from the brusque manner of the FCC engineers. At that time, the VE-CW test included submitting my "hard copy" along with a ten question, "fill-in-the-blank" written test. Around 2000, the CW qualifications for Extra Class were reduced to only the beginners level of 5 wpm. Eventually, CW requirements were totally eliminated for Extra Class and all other levels of amateur licensing. How times have changed.


photo left: This is a late Instructograph that runs on AC and has an internal solid-state audio oscillator. Note the larger box provided for tape storage and instructions.


Landline Telegraph Equipment

The following is just a very small sample of the vast amount of Landline Telegraph Equipment that was produced. The earliest telegraph gear will be for wire landline use going back to as early as the middle of the nineteenth century. Most of what we find today dates from the early twentieth century. Landline used American Morse Code which was a slightly different code when compared to the later International Morse Code. Aurally the two codes are completely different with International operators hearing "dits and dahs" in sine wave tones (hopefully) while the American Morse operators hear "clicks and spaces" from a sounder. 

J.H. Bunnell Company, W.U. Tel. Co. & O.C. White Company

Sounder in Resonator Box with Articulated Arm Desk Mount

The sounder is the "receiver" of the wire telegraph. Originally the "Morse Register" was a mechanical method of receiving the code but operators soon found that they could "read" the code directly from the aural information heard as the machine operated. This led to Morse's associate, Alfred Vail, building a device that allowed the operators to hear the code directly. The sounders were sometimes installed into resonator boxes to amplify the clicking sound produced. Sounders are rated by the DC resistance of the solenoids. The DC resistance determined the maximum distance between two stations where the sounders were connected directly to the line and were powered by the battery DC voltage source. The greater the distance between stations, the higher the DC resistance of the wire was and therefore the greater the voltage drop if the sounder solenoids were of a low DC resistance. Sounders were produced from the mid-nineteenth century up into the 1960s or so.

Otis C. White was located in Worcester, Massachusetts and specialized in cast iron, articulated arm mounting devices, mainly for lighting for desks and machines. The use of the articulated arm allowed the operator to position the sounder resonator box for best listening depending on the noise and activity in the station area. Active use is probably later than the patent date that is on White's arm, which is 1911. The actual use date of this one shown is probably in the 1920s or 30s. Obvious are the U.S. Army Signal Corps acceptance stamps implying the military use of this example.

The sounder used was built by Bunnell and has both solenoids wired to individual terminals. This allowed the user to connect the solenoids in series or parallel depending on the line distance. Each solenoid measures 200 DC ohms so a series connection results in 400 ohms and a parallel connection results in 100 ohms (although the tag indicates "18-400 ohms.") A metal Western Union (W.U. TEL. CO.) tag is mounted to the sounder base implying that WU may have been supplying the Army with their telegraph system in this particular case. The resonator box is also built by Bunnell and it has a cast metal rear bracket that was probably for paper "messages to be sent."


J.H. Bunnell Company

4 ohm Sounder

It's likely that several million sounders were built over the years from the mid-1800s up to the mid-1900s. Every railroad station had to have several. Sometimes the local telegraph office was at the local post office. Other times there was a specific "telegraph office" in the town. Then there were the many other users that included inter-office communications (pre-telephone) in large buildings or building complexes. The local users had the 4 ohm sounders. These were just about the lowest DC resistance available and allowed for very short distances on direct wire operation using a couple of gravity batteries as the voltage source. It was also common to use the 4 ohm sounders in conjunction with "sensitive relays" that allowed the relay to operate greater distances on the line and then to operate the sounder as a local device. Some of the 4 ohm sounders were for instructional devices since this was about as "local" as one could get.

Patent date on this Bunnell sounder is May 7, 1895 but it probably dates from much later.


Western Electric

3B Sounder in Resonator Box with Brass Pedestal Desk Mount


Western Electric was the manufacturing arm of American Telephone and Telegraph Company. They made many types telegraph devices such as keys and sounders along with other telegraph equipment. Western Electric was the W.U. competition. Western Electric and Bell backed the telephone over the telegraph which seemed to favor W.U. at first. As the telegraph gave way to the telephone, W.U. lost substantially and they were eventually bought by the Bell System in the late twentieth century.

This is a Western Electric 3B 20 ohm Sounder mounted in an oak resonator box mounted on an impressive brass pedestal.

DC Resistance versus actual distance has a few variables. The voltage source was determined by how many batteries were being used. The potential available would be an important factor in distance covered. Although it's not really specified what voltages were used, it probably was between 50vdc and 150vdc. The size of the wire determined the DC resistance per foot of the line between the two stations. The distance between field poles determined what type of wire and what diameter wire was used and that determined the DC resistance per foot. Sounders were normally energized and the entire line was normally a complete series circuit. Each key had a switch that was kept closed when all stations on the line were in the "receive" mode. To send, an operator would "open the key" and that would drop out the sounders at which time the operator would begin sending his message and that operated all sounders on the line. When finished, he would "close the key" to keep the circuit energized. All of the sounders on the line presented a "series load" that was the DC resistance of the all of the solenoids added up. Each line had to have the total load calculated to keep the system capable of operating while taking into account all of the other variables that might happen along the line. The higher the total resistive load on the line, the lower the voltage drop across the line and the longer distances can be covered by the system.  


Western Electric

3C 140 ohm Sounders


Western Electric 3C 140 ohm Sounders would be for long distance operation direct on the line. Initially, Morse's system used two wires but very soon it was discovered that a single wire could be run between stations and each station could use an Earth ground for the return. Each station had batteries for the potential and large surface area metal plates were buried to provide a substantial Earth ground. With low DCR sounders drawing more current to operate the voltage drop across the single wire increased to the point where the sounder wouldn't operate. High resistance sounders didn't draw as much current and therefore could operate for greater distances before the voltage drop increased to the point where the sounder wouldn't function. The system depended on how many sounders were in series on the line. Fewer sounders would require each solenoid to have a higher DCR.  

Most stations would use the low DCR sounders on a local circuit within the station and the line(s) would be operating high DCR Telegraph Relays.


Unknown Mfg'r

Telegraph Relay


When great distances had to be covered, sounders generally weren't operated directly on the line. A sensitive relay used high DC resistance solenoids to operate a set of contacts that could operate a local circuit which had low DC resistance sounders. The DC resistance on this relay is 50 ohms which allowed it to operate greater distances between stations. There is an extra switch circuit to the right. The switch contacts go directly to the two terminals on the right end of the relay. Lifting the red knob opens the switch. The middle terminals are for the local line connection and the left end terminals are for the wire line input.

The manufacturer of this beautiful device is unknown. There isn't any builder identification anywhere. It resembles equipment built by Postal Telegraph and that company many times didn't label their equipment because it was for use by Postal Telegraph stations and the labeling would be superfluous. This relay probably dates from the early twentieth century.


Unknown Mfg'r

Polar Relay


The builder of this beautiful Polar Relay isn't identified. The two solenoids work in conjunction with the "wrap-around" horseshoe magnet. The contact arm remains stationary between the N and S contacts if the solenoids aren't energized. If a connection is made to the two input contacts that is positive then the arm will move to the N contact. If the opposite polarity is made to the input contacts (negative) then the arm will move to the S contact. The connection labels are arbitrary and dependent on the hook up and system. The basic function is that the change in polarity between the two input contacts results in the selection of either arm to N or arm to S with those terminals being the three grouped together on the left side of the board. The input terminals are the two grouped on the right side of the board. The polar relay worked with a different type of telegraph system called the duplex circuit that could run multiple signals on a single wire. This evolved into the quadruplex system the used polarity changes for additional signals on a single wire. This polar relay is beautifully made with turned finished brass sub-base and a mahogany wooden base. It probably dates from around 1900.


The Instructograph Company, Chicago, Illinois

American Morse Instructograph


This is an early Instructograph with wind-up motor drive. Note that this version has a removable lid that is held on with two latches. Note also that the tapes are for American Morse. I'm not sure about the masonite panel. It appears to have wear and looks original but I've never seen masonite used as a panel on any other Instructograph. Note that this version doesn't have a knob anywhere on the panel. This indicates that the machine has no internal, battery operated audio oscillator. This implies that the machine relies on the user to provide an external indicating device. Since the tapes are for American Morse the reproducer should be a sounder and battery combination.





1. "The Vibroplex Co.,Inc." by William R. Holly K1BH - 1990 -  Detailed history of Horace Martin, J.E. Albright and the Vibroplex Company.

2. "Vibroplex Keys" - Tom French -  Detailed info on the various models


1. Vibroplex Serial Numbers - WW7P Serial Number Log is at  the serial number log is a PDF.

2. Telegraph Keys - Landline and Radio Keys plus more - - K5RW Neal McEwen's extensive website devoted to telegraphic codes and instruments. Great reference source.

3. Telegraph Keys of all types -  -  W1TP, Ted Perera's vast website has all types of keys and gear with lots of photos. Includes keys from other collections. Great reference source.

4. T. R. McElroy - World's Champion Telegrapher -  has the best information on Ted McElroy. Wikipedia also has some interesting info.

Telegraph Key Parts 

1. New high-quality reproduction parts for most makes and models of speed keys including early Vibroplex, Speed-Ex and McElroy plus some models of hand keys - order directly from their online catalog at   Donnie makes and supplies great quality parts that aren't available anywhere else. Knob and paddle reproductions for early keys can be supplied with a matte-finish for a vintage appearance.


Thanks to all of those hams and key collectors that have contributed information and details on all types of telegraph equipment over the years, either in person or "on the air."


Henry Rogers, Western Historic Radio Museum, Radio Boulevard © 2013 - 2018,   added "References" Jun 2017,


Donations to Radio Boulevard - Western Historic Radio Museum's Website

If you enjoy using Radio Boulevard - Western Historic Radio Museum's website as an information resource and have found our photos, our hard to find information or our restoration articles helpful, then please consider a donation to the WHRM website. A small donation will help with the expenses of website operation, which includes research, photographing and composition. WHRM was a real museum that was "Open-to-the-Public" from 1994 to 2012 - eighteen years of operation. WHRM will continue to provide its on-line information source with this website, which has been in operation since 1997.

Please use PayPal for sending a donation by clicking on the "Donate" Button below


Website Navigation Index

-  WHRM History  ~  Nevada Radio History  ~  The KOWL XMTR  ~  Full Length Articles with Photos -


Western Historic Radio Museum Information
 Contact Info, Museum History 1994-2012, Museum Photo Tour, Using Photos and Info from this Website & Radio Value Info

Nevada Radio History - 1906 to 1930
Arthur Raycraft, Nevada's "Father of Wireless," America's First Radio Tour, Early Nevada BC Stations & More

KOWL's Gates BC-250L BC Transmitter
2007 Move from Lake Tahoe - Restoration - PLUS -  2013 Move to Dayton, Nevada & Getting on 160M

Parish House History
1876 to Present
Virginia City, Nevada

Lots of Photos


- Wireless Apparatus, 1920s Radio and Communications Equipment  ~  Full Length Articles with Photos -

M.H. Dodd's 1912 Wireless Station
100th Anniversary  Edition 
Includes New Photos, Reassembly Info and Lots of Original Vintage 1912 B&W Photos + Reassembly in Dayton

Universal, Intermediate Wave and Short Wave Models History, Restoration and Operation - Lots of Photos

"A Guide to the Synchrophase MU-1"
Comprehensive Manufacturing History, Restoration, Neutralizing, Performance Information - Lots of Photos


 SE-1420, IP-501 & IP-501A
"The Classic Shipboard Wireless Receivers"
Comprehensive History, Restoration and Operation Info - Tuning in NDBs with IP-501-A

Vintage Long Wave Receivers
Long Wave Receiver Profiles, Loop Antenna Info, NDB Info and Log,
Fallon NV "Master - M" Loran Station Tour



- Vintage Communications & Amateur Radio Equipment  ~  Full Length Articles with Photos -

National Co. - HRO Receiver
"The Cream of the Crop" 
Comprehensive History, Serial Numbers, Restoration, Lots of Photos & More

National Co. - NC-100 Series
"Moving Coil"  Receivers 
Comprehensive History, Serial Numbers, Restoration & More - Includes Civilian Versions, Military Versions & Airport Versions

Hallicrafters SX-28
"A Pre-war Masterpiece"

Comprehensive History, Serial Number Analysis, Restoration Details & More

Hallicrafters DD-1 "Skyrider Diversity"
Comprehensive History, Serial Numbers & Restoration Details

NEW!          Navy Dept - RCA - RAA-3 Receiver
1930s Ship or Shore Station Longwave Superheterodyne
History, Circuit Design & Construction Details,
Restoration Log with Lot of Photos

 RCA's Amazing AR-88 Receivers
Comprehensive History, Restoration Info, How to do IF Sweep Alignments, Serial Numbers & More

RCA's Legendary AR-60 Receiver
Comprehensive History, Serial Number Analysis, Restoration Details & More - including the AR-60 connection to Amelia Earhart's Disappearance

Hammarlund Mfg.Co.,Inc
The Incredible Pre-War 'Super-Pro'
Comprehensive History, Serial Number Analysis, Restoration Details. Includes info on the Hammarlund Comet Pro

Patterson Radio Company
   PR-10 Receiver & Pre-selector              
Comprehensive History, Los Angeles Radio Mfgs History, Circuit Details, Serial Numbers, Restoration Details & More

NEW!    Hallicrafters' Super-Pro, the R-274 Receiver
Comprehensive History, Circuit details with Comparison to the Hammarlund SP-600, Restoration Details, Best features of each Receiver. Yes! You can VOTE for your favorite Super Pro


-  Rebuilding Communications Equipment  ~  Full Length Articles with Photos -

Rebuilding the R-390A Receiver
Detailed Restoration Information for each module with Lots of Photos

Rebuilding the ART-13 Transmitter
Detailed Restoration info - includes details on building AC power supplies (with schematics) Lots of Photos

Rebuilding the Hammarlund SP-600
Detailed Restoration Information with Lots of Photos

           T-368 Military Transmitter                    
Detailed Information on Reworking, Testing and
Operation with Lots of Photos

Rebuilding and Operating the AN/GRC-19
T-195 XMTR & R-392 RCVR

 Detailed Information with Lots of Photos

Successfully Operating the BC-375 on the Ham Bands Today
Detailed Information on Power Set-ups that Work, Dynamic Neutralization, BC-191 Info & More

Rebuilding the Collins 51J Series Receivers
Detailed Restoration Information with Lots of Photos - Includes R-388 Receiver

Rebuilding the BC-348 Receiver
Detailed Information on all BC-348 Types, Dynamotor Retrofit Information, AC Power Supply Enhancement - Lots of Photos

Building an Authentic 1937 Ham Station
Utah Radio Products - UAT-1 Transmitter


- WHRM Radio Photo Galleries with Text -

Entertainment Radios from 1922 to 1950

Roaring 20s Radios
1922 to 1929

Vintage Table Radios
1930 to 1950

Floor Model Radios (Consoles)
1929 to 1939

Only Zenith Radios
1930 to 1940

Communications Equipment from 1909 to 1959 - Commercial, Military & Amateur

 Early Ham & Commercial Wireless Gear
1909 to 1927

Classic Pre-WWII Ham Gear
1928 to 1941

WWII Communications Equipment
 U.S. Navy & U.S. Army Signal Corps  1941 to 1945

Commercial & Military
Communications Gear
1932-1941 & 1946-1967

Post-WWII Ham Gear
1946 to 1959

Vintage Broadcast Equipment, RTTY, Telegraph Keys & Vintage Test Equipment

Vintage Microphones
 & Vintage Broadcast Gear
1930 to 1950s

Radio Teletype - RTTY - with Real Machines
includes TTY Machines, Military TUs and Amateur TUs

Telegraph Keys - 1900 to 1955
"From Straight Keys to Bugs"
Hand Keys and Semi-Automatic Telegraph Keys

Vintage Test Equipment
1900 to 1970

Includes Tube Testers, Freq Meters, Wobulators and More


Radio Boulevard
Western Historic Radio Museum

 Vintage Radio Communication Equipment Rebuilding & Restoration Articles,

 Vintage Radio History and WHRM Radio Photo Galleries

1909 - 1959



This website created and maintained by: Henry Rogers - Radio Boulevard, Western Historic Radio Museum 1997/2017