FM Transmitter Bugs


Posted on Feb 5, 2014

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


FM Transmitter Bugs
Click here to download the full size of the above Circuit.

one and a half turns from the supply end. Audio sensitivity is very good when used with an ECM type microphone insert




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Lead Acid Battery Discharge protector
Arduino Master Reader
Audio and amplifier circuits
Make circuit of the inverter and operating principle by oneself
µP-Controlled Oscillator Delivers Rock-Bottom Distortion
stable fm transmitter
Audible Flasher Warning
PULSE DELAY



Top