Short Wave Converter (T987E)

The conversion range of this circuit depends on the coil. The circuit uses two tubes, and the power supply is not provided.

Who is the fastest Game (CB12394E)
This circuit was found in a 1990 Electronics Handbook. The transistors can also be the BC548 and...
741 MW radio (CB10644E)
This circuit is from a 1987 American publication called Electronics Handbook. The circuit can be...
Telephone Interception Detector (CB17045E)
This 1995 documentation circuit detects when an extension on a phone line is active. Adjustment of the...