This oscillator was found in a 70s RCA linear circuit manual. The oscillator makes use of an integrated device from the time, difficult to find today.
This source for 50 W amplifiers per channel was found in 1967 Delco documentation. Transistors are from...
Operated directly from the power grid, this detector was found in an 80's RCA documentation. The sensor is...
This oscillator was obtained in a 1960 transistor manual from Sylvania. The transistors are from...