Crystal oscillator
Quartz Oscillator 3225 20M OSC
The oscillator operates from 2 to 12 VDC (the output is optimal at 9 to 12 V and the keying is clear). R1 can be replaced with a 500K potentiometer and the circuit scans the entire audio frequency range.
Coalbed Gas Generator,Diesel Water Pump Generator,Diesel Geneator Water Pump,Silent Gas Generator
Jiangsu Vantek Power Machinery Co., Ltd , https://www.vantekgenerator.com