Colpitts Crystal Oscillator
- Spiliopoulos Kwstas
- Non tested
This project is a Colpitts Crystal Oscillator
Firstly, I suggest you to read the article in ARRL Handbook 2015, Chapter 9 – Oscillator Circuits and construction. Then saw a video showing the construction of the Colpitts Crystal Oscillator (with Buffer stage) here.
Thus, I assembled the circuit as “ugly construction” using the same values as video shows. I try it and it’s stable, using 12 Volts from battery source, low current.
Every time I change the crystal values I had a stable Sine Wane on my Oscilloscope which depends on different crystal values. It is a simple circuit to test crystals on your lab, see photos from Cadsoft EAGLE, the schematic, pcb results also the photos from “ugly construction”