FM voice transmitter for Band 2 VHF


Posted on Feb 6, 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 voice transmitter for Band 2 VHF
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

Colour (Sound) Organ
Trainwreck Blues tube amplifier for Guitars
Rain alarm-door bell
Temperature Sensor
Harmonic Distortion Analyzer Circuit
TDA1514 40 Watt Audio Amplifier Circuit
Push Button ON-OFF Soft Latch Circuits
Home-Built Pulsed Multiple Gas (PMG) Laser
JCM800 2204 bias problem
50 Watt Hi-Fi power amplifier circuit



Top