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My Commercial Kitset Regen tube Receivers

KUHN Electronics Inc. 353B Lightweight 1960's 6 tube super regenerative set, AM & FM, Shortwave and AM/FM utilities 24 -174Mhz in 9 bands (not continuous)	Ocean Hopper 3 tube TRF c/w all 6 coils. Has the Usual 50C5 audio, 35W4 rectifier and 12AT6 a.preamp & detector lineup. Over the years the Ocean Hopper schematic varied. Some show only 2 tubes, a pentode 12SJ7GT and a 70L7GT for audio and power rectifier.
GR-81 This Heathkit Economy Short Wave Listener's Radio is a three tube four band regenerative set covering 140kHz to 18 mHz. Tubes are 35W4 as rectifer, 50C5 for audio output and a 12AV7 dual triode as the regenerative RF detector and a first stage of audio incorporating an isolation transformer for safety.	Explor-Air KT-135. Lineup is again the 50C5, 35W4 and 12AT7 tubes with 4 inch speaker. Covers bands: .550 to 1.6 mhz, 1.7 to 5.0 mhz, 5.0 to 16.0 mhz, 15.0 to 32.0 mhz Two different knob verisons avail.
Allied- Space Spanner Regen 3 tube mains TRF, tube lineup 50D5, 35W4 and 12AT7. Covers broadcast and the shortwave band from 6-18 Mhz. All of the radio receiving and detecting and a stage of audio amplification are done by a third tube, the 12AT7, a real tribute to the simple and efficient design of a regenerative receiver. A later version sports a two-tone color on the front panel.
Together with the likes of the Star Roamer and the Span Master these are the most classic and collectable kitset regens available today and are sure to have kicked off the careers of many a boy builder.. They are extremely simple, low power, pure fun & frustration to operate, immune to imaging and signal overloading and able to resolve SSB without a product detector or BFO. They are very sensitive if operated just on the verge of the detector breaking into unwanted oscillation. Be sure too try one out sometime.




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