hallicrafters HA-2, HA-6 Transverters. Converts 10 meter transceiver to 6 or 2 meters. Front panel controls: Power on/off, range selector, tuning, loading, output indicator, plate current meter. 5894 in the final. External power supply required 750 volts/160ma., 250 volts/70ma., minus 60 volts/10ma. 8"H x 17"W x 8 7/8"D.



Hallicrafters S-19R Sky Buddy Hallicrafters low-priced transformer operated receiver, circa 1939. A later variation of this model uses a toggle switch for the standby-receive function instead of a slide switch. The "meter" in the center is really the bandspread scale.


Hallicrafters S20R Sky Champion The S20R is a prewar (1941) general coverage receiver. It was also sold after the war. The letter font for the "Sky Champion" logo on this one is different from that of another known to have been purchased prewar. It is possible that this set may have been made after the war.


Echophone EC-1 Made by Hallicrafters, this receiver predated the S-38 series but had similar AC-DC design. Introduced prior to World War II, it was advertised throughout the war in QST and other electronics magazines. Most of the ads for the receiver featured cartoons of a fictional Private (later Corporal) Hogarth and his army buddies listening to the EC-1.


Hallicrafters S-38 S-38D (left) and S-38C (right) The S-38 series are postwar AC-DC general coverage receivers. Given the low-end circuitry, they are surprisingly sensitive. Many an amateur radio operator and short wave listener started out with one of these. The S-38 (no letter), S-38A, and S-38B all have a dial face similar to the S-38C although the cabinet color will be black. The original S-38 (no letter) had 6 tubes with one used for the BFO. It also had a variable BFO control on the front panel and an additional red slide switch on the left side for noise limiter. Toward the end of the model run, a 5 tube version of the S-38 (no letter) was introduced which became the standard for the entire series, using regenerative IF for the BFO.


Hallicrafters S-36A The S-36A covers the "Ultra High Frequencies" according to the front panel logo (27.8 to 143 Mhz) in AM or FM. It and its predecessors, the S-36 and S-27, were used during the World War II era and later to monitor the frequency spectrum now called VHF. The British also used this series of receivers to monitor some of the German radars. The front end uses three acorn tubes, the 954, 955, and 956. The schematics are listed in Riders. As can be seen, this model has the schematic factory mounted inside the top cover. The bandspread escutcheon, essentially a square meter face, is missing on this example. Priced at $415 in December 1945 Allied Radio ad in Radio News.


Hallicrafters SX-28 "The new 1941 SUPER SKYRIDER. A few fundamentals of the new Super Skyrider are 6 bands covering 540kc to 43 mc - 2 stages of preselection - high fidelity, push-pull audio - band pass audio filter - a new and highly efficient crystal filter circuit - an additional and completely effective noise limiter - cadmium plated steel chassis - standard relay rack panel 1/8 inch thick - machine tool, gray wrinkle, well ventilated steel cabinet. Hallicrafters-Jensen Bass Reflex speakers available. Sells, complete with crystal and 14 tubes, less only speaker, for $159.50 net."

The SX-28 is arguably Hallicrafters' finest pre-war set. It is a very well designed and engineered single conversion Broadcast and HF receiver. It uses push-pull 6V6 audio output tubes and is known for excellent sound on AM broadcast. It was often advertised with a large matching Hallicrafters-logo floor-model Jensen speaker. Many saw service during the War. The SX-28 and its sister VHF models, the S-27 and S-36 are often pictured as rack-mounted in British government listening posts for monitoring German radar and communications. The FBI also used these during the War to monitor the airwaves for clandestine communications. After the War, these were used by the FCC to monitor domestic radio transmitters. A Radio News 1946 picture shows one installed in an automobile equipped for monitoring by the FCC.


SR-500



HT-37



SX-43



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