This power supply uses a Raystor which is a 1964 LDR lamp coupler. The circuit was found in an Electronic Design and the transistor can be replaced with the current equivalent.
This circuit was obtained from a 1966 documentation. The transistors are of the time. The circuit...
Using 3 ports, this rectangular oscillator was found in the March 1996 issue of Electronics Now...
With this circuit it is possible to vary the resistance by adjusting the mark/space reaction of...