A simple radio station project for the High frequency Experiment

Using LC oscillator to generate a high frequency wave 90MHz-100Mhz, and a microphone to generate a small vocal voltage. When speaking to the microphone, the voice can be heard through FM radio.

The oscillator Circuit

Whole Circuit

The base voltage of the triode is near 3V and the microphone voltage is 5V.

Make sure the oscillating wave has Vopp larger than 3V

The pcb board I use

The oscillator wave(yellow) and microphone signal(blue)