Power Switch (CB23949E)

This circuit for the power grid was found in the June 1969 Radio Electronics magazine. The load is dependent on the SCR and the control is half-wave.

27 MHz SW Transmitter (CB14893E)
This transmitter was found in a 1993 documentation, but it can be assembled with operators like...
Card Code Switch (CB16818E)
This circuit is from a 1997 publication. In it, the circuit uses a light emitter that points to a...
SWR meter (CB16783E)
This Meter of Standing Wave Ratio (SWR) was found in a 1994 documentation. The circuit uses only...