FM Transmitter Bug
Electronic Schematics > RF circuit > FM Transmitter Bug


Application Notes:
This small transmitter uses a hartley type oscillator. Normally the capacitor in the tank circuit would connect at the base of the transistor, but at VHF the base emitter capacitance of the transistor acts as a short circuit, so in effect, it still is. The coil is four turns of 18swg wire wound around a quarter inch former. The aerial tap is about one and a half turns from the supply end. Audio sensitivity is very good when used with an ECM type microphone insert.   David's email :

Title: FM Transmitter Bug
electronic circuit
Published on: 2005-02-03
Reads: 1771
Print version: Print version

Other electronic circuits and schematics from RF circuit

Electronic circuits > RF circuit > FM Transmitter Bug