Kinescope Rejuvenator (T464E)

This utility circuit for old TV restorers was found in a Popular Electronics from November 1968.

Adjustable Regulator with the LM320 II (CB1202E)
The LM320 is a negative voltage regulator up to 15 V with maximum current of 1 A. In this circuit we...
Intrusion alarm (CB7239E)
This circuit is from a 1965 General Electric manual. It uses components from the time that admit...
Symmetrical Adjustable Power Supply (CB1210E )
With this circuit, from a 1991 publication, it is possible to regulate the output of a symmetric source...