60 Hz Suppressor (CB6738E)

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

Second-order variable filter (CB9768E)
This 1kHz filter with Q = 10 can be applied to any operator. The power supply is symmetrical and...
12 V x 700 mA variable power supply (CB8676E)
This circuit was found in a 1967 Electronics World. Transistor Q1 can be a TIP321 and Q2 can be a...
Relay Flasher (CBB10606E)
We found this circuit in a Radio & Electronics Constructor from November 1975. The magazine no longer...