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
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)