Phone Patch (CB9398E)

This circuit was found in a 1969 CQ magazine. It is intended for coupling telephones to radio amateur equipment

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LED beacon (CB21017E)
This circuit was taken from a popular 90's Electronics. The LDR is mounted next to the LED to feed...
Electronic Ignition (CB6387E)
No information is given on the transformer in this circuit that we found in an American 1967...
Colpitts Oscillator (CB16043E)
This oscillator can be used to produce signals ranging from a few kilohertz to approximately 10...