How to Make a FM REGEN regenerative radio schematic
Автор: Andrew Ferg
Загружено: 2020-04-28
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Demonstration available at • FM Regen Radio Regenerative Receiver 3 and • FM Regen Regenerative Radio Receiver
Additional schematic at • How to Make a Regen FM Regenerative Receiv...
CORRECTION: Schematic shows JEFT Drain to ground, which is an obvious error. Drain should be connected to the coil at the same node as the 33p cap.
Several viewers have asked for a simplified schematic. This diagram shows only the receiver, without the loose-coupled antenna, adjustable voltage regulator, or audio amp. It will work as is with very low volume but is a good starting point for your experiments with regenerative receivers. The active components are a J211 FET, a general purpose NPN, and a germanium diode. The main coil is 5 turns of 23awg magnet wire (approximately 50 to 100nH). You will have to use trial and error to get your coil and variable cap to resonate. The other inductors are used as RF chokes. Regen radios are voltage-controlled devices. You will need to have or build a variable voltage supply. Proper grounding is essential. Copper clad board works best, but you can use perfboard if you're careful.
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