Found in the 1975 RCA tube manual, this circuit appears elsewhere in this section. The circuit uses contemporary components and is powered by the power grid.
This circuit makes use of a sensitive 5 mA reed-relay to be driven directly by a phototransistor. The...
This circuit was found in a 1967 RCA manual. The transistors are of the time. The adjustment is made to...
This powerful amplifier was part of commercial sound circuits from the 90s. The integrated circuit...