4.5W FM Transmitter

Finally a somewhat tuned version of an FM transmitter. It's almost impossible to tune an RF circuit in EC Just mashed up a few circuits here. The intriguing part of the circuit here is the oscillator, where two Hartley oscillators are tuned to half the transmission frequency. Their outputs are combined and doubled on the output to form a more stable oscillation frequency than what could be achieved with a single oscillator. Oscillation frequency should be somewhat stable even without external PLL control, however if you can mash up something together, it should make a very practical FM transmitter.

published 5 years ago