Short Range 200m fm transmitter

349

03:14:09

Circuit for ~200m range fm transmitter.

Note:
Replace microphone in place of      current source used here.
Both Transisters are 2N3904.
Diode Used 1N4148.
Capacitor(3pF) connected parallel to 100nF is varicap(3-10pF).
The Earth Symbol connected at the node of varicap(3-10pF) and capacitor(4.7pF) is the antenna.

published 11 years ago

divtk

11 years ago

I think 30 cm aluminium wire is suitable for antenna...

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