Tone Oscillator (CB22066E)

Found in old documentation, this oscillator with the LM380 produces an audio tone in a speaker. Frequency is set in VR1.

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...