Dynamic compressor (CB21762E)

This circuit was found in a 1977 publication for radio amateurs. Transistors are common general-purpose types of the time.

1.2 GHz Oscillator (CB19070E)
This circuit was found in a 1966 publication using a microwave transistor of the time. The circuit...
Tachometric Pickup (CB13430E)
The integrated circuit used in this application is the National Semiconductor's LM2907, the...
Unijunction timer (CB10846E)
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...