Square to Sinusoidal Converter (CB6595E)

This circuit was obtained in an American publication of the time. Transistors are commonly used. The circuit can be adapted for use as a shield.

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Crystal Signal Generator (CB6189E)
This QST circuit generates 4 frequency signals according to the crystals used. Transistors admit...
Ring Launcher (CB7805E)
This countdown electromagnetic ring launcher was found in an Electronic Hobbyst Handbook from...
Beat frequency indicator (CB9814E)
This TTL circuit was found in an American documentation from the 80s. The components are common in the...