SCR Alarm oscillator (CB6114E)

This circuit was suggested by General Electric in a 1965 documentation. The circuit can be implemented with equivalent SCR.

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1 kHz tuning fork (CB14363E)
The circuit presented is based on a mechanical tuning fork. The circuit is suggested by National...
Variable Source (CB18169E)
This source, from a 1982 documentation, uses a triac to control the power and voltage applied to...
Symmetrical Powered Amplifier (CB5024E)
This circuit was found in a 1990 Electronics World magazine. The circuit can be mounted today by...