This 4-channel mixer amplifier was found in an American publication from 1947. The circuit uses counterphase output tubes and a transformer power source.
This circuit keeps the courtesy lights of a car on for a while after the doors are closed. The...
This circuit was obtained in an Electronics Now from the 90s. The circuit uses operational...
This circuit was originally designed to measure the gain of two-door RF MOSFETs as indicated by...