This bench circuit was found in Radio Electronics magazine from June 1958. The circuit does not have an external power supply. The circuit generates signals from 12 Hz to 180 kHz in 4 bands.
Found in a 1980 documentation, this circuit drives a transducer (X1) when the car battery has its...
The integrated circuit used in this circuit from a 1987 documentation is no longer common today....
This 1967 commercial radio covers 6 wave bands selected by appropriate coils. The circuit...