This RF amplifier step has a dynamic range of 140 dB and can amplify signals from 0.5 to 40 MHz. FET is old, but modern equivalents can be used.
This circuit is from a 1954 transistors publication. The transistors are the CK722 among the first...
This sophisticated circuit of the coin-toss game was found in an American 1980s documentation. The circuit...
This windshield wiper interval was found in an old documentation. The SCR can be the C106 and the...