This amplifier provides up to 15 W of output when powered by a simple 12 V source. The integrated circuit must have an excellent heat sink.
The purpose of this circuit, found in a documentation for radio amateurs in 1974, is to amplify noise...
This circuit was obtained in an old American documentation. The integrated circuit used is...
This is a Japanese commercial radio from the 60s. The circuit is listened to by phone and is...