Microphone preamp (CB22043E)

This preamp was found in an old English publication. Any usage JFET can be employed. The output is high impedance.

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...