Fm Radio Transmitter Circuit

Posted on Jul 9, 2012

An FM radio generates an interference signal that can be picked up on another FM radio tuned 10.7 MHz above the first one. The 50-k0 potentiometer adjusts the modulation level to maximum without distortion. The RC network improves the fidelity of the transmitted signal and provides dc isolation. The component values shown are provided as a starting point. They can vary somewhat for different radios. Note that if you can`t get the signal at 10.7 MHz above the frequency setting of the first radio, try tuning at 10.7 MHz below.

Fm Radio Transmitter Circuit
Click here to download the full size of the above Circuit.

Also, note that both tuned frequencies must be unused. Otherwise, you will hear your audio on top of the audio that is already there. You might have to play with both frequencies until you find two blank spots that are 10.7 MHz apart.

Leave Comment

characters left:

New Circuits



Popular Circuits

Fastest Finger First project
power supply (300V, 50mA + 6.3V, 3A max)
12-Bit dac with variable step size
Astable Multivibrator
3v low battery voltage flasher
Introduction to PWM Inverters
UHF Indicator - Wavemeter
High-performance quadrature sine wave type oscillator circuit
baby Tesla coil
Stimulated simple motor speed control circuit
Low drift integrator
Valve Transmitter circuit 70W