TRF AM MW radio with LED as a AM demodulator ( part two )

Описание к видео TRF AM MW radio with LED as a AM demodulator ( part two )

TRF AM MW radio with LED as a AM demodulator. Circuit with NPN transistors. LED's glow is a very weak ( transistors with greater h21e give less base current ). This circuit can work with silicon diode and without diode ( transistor as a AM demodulator ).
If occur problems with motorboating sound, 1) flip coupling coil, 2)reduce 10uF* cap value to 4,7...1uF.
RF oscillation can reduce, moving away coupling coil from main LC tank's coil.

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