3 W Stereo Amplifier (T368E)

This 3.5 W circuit per channel was found in the 1961 RCA tube manual. The circuit is power grid directly rectified without a power transformer

Antenna Switch using Diodes (CB4156E)
We find this circuit in a 1980s documentation for amateur radio. The circuit shows how to switch...
Half Wave Dimmer (CB5296E)
The SCR used in this 80's circuit depends on the load. The control is half wave and instead of the neon...
Tone Burst Repeater (CB3959E)
This circuit has been found in older telecommunications documentation. The circuit switches off after...