One-transistor oscillator (CB22064E)

Capacitors C2, C3 and C4 determine the frequency of this simple oscillator. Transistor can be general purpose equivalent.

Magnetic Pulse Generator (CB11865E)
The L1 coil consists of 20 to 100 turns of fine wire in a cardboard box where plant specimens are...
Current to voltage converter (CB9600E)
This circuit was found in a 1980s documentation from the manufacturer of the integrated. The...
Phase Selector and Detector (CB24627E)
The circuit also works as a synchronized rectifier and balanced modulator. We found it in the...