| Country/Region of Manufacture | United States |
|---|
Check the listing for details. SCHEMATIC ONLY GLOW-BULB 42 TUBE SHORTWAVE/AM BCDST REGEN (535khz to 14.8mhz). Condition: Used. Listed at 17.50 USD. This is a big no for regen radios, as it will inject ac hum into the audio. These power pentode tubes make great regen receivers. The circuit uses a rare 1930's balloon-globe 42 pentode tube, plus a one transistor, built-in headphone amplifier.
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