This circuit is from American documentation. The components used are still common. The power supply must be symmetrical.
This circuit generates frequencies determined by R3 and C1. We found it in the Radio Electronics magazine...
Found in a 90s Elektor, this circuit makes use of general-purpose transistors, except T4 that can...
This circuit is based on a component from the time, the MSM0322 integrated circuit. It modifies the...