This integrated amplifier was found in a non-existent British magazine from 1975. The used integrated circuit is still popular and the mono bridged version can provide 36 W output power. 4 A.
Found in American documentation from the 90s, this circuit has the signal frequency determined by...
This two-transistor regenerative switch works as an excellent trigger for SCRs and other devices that...
This receiver for listening to headphones and 2-battery power was found in Japanese documentation from the...