Found in Philips' 90s documentation, this small source can use modern transistors like the BD135 for TR4 and the BC series for the rest.
This circuit is from the 1971 Motorola SCR Power Control Fundamentals. The circuit can be made...
In the figure we show another configuration for a crystal-controlled overtone oscillator using a...
This circuit was found in the 1990 Motorola Linear Databook and can use almost any operational...