This amplifier was found in a 1957 Rayrtheon documentation. The circuit can be fitted with a BC558 transistor. Driver and output transformers can be obtained from unused transistor radios.
This instrumentation circuit was found in the 1960 transistor application manual. More modern...
Other operational Amplifiers in the series, such as the MC34072, MC34074, MC35071, MC35072,...
This interesting 80's logic circuit consists of a gate that can be programmed according to the...