60 Hz Suppressor (CB6738E)

This filter is intended for 60 Hz noise suppression in amplifiers. We found it in American documentation from the 60s.

Notch Filter 741 (CB10868E)
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
Magnetic capsule preamplifier (CB7102E)
This circuit was found in a Popular Electronics from the 90s. The circuit uses general purpose...
Variable Regulator (CB15004E)
This voltage regulator circuit has a traditional configuration with two transistors, and can be...