We’ve read a lot about oscillators, but crystal oscillators seem to be a bit of a mystery. Hobby-level books tend to say, build a circuit like this and then mess with it until it oscillates.
This article presents a compact real-time solution for this by presenting a modified Colpitts oscillator. The proposed oscillator is designed with lossy fractor, such that Cole-modeled sensing devices ...
A free-running oscillator is today rarely seen in a radio transmitter, but at the time their single-tube Colpitts oscillator using a UV-204 transmitting tube would have been considered a stable ...