This circuit produces sounds of 6 different notes depending on the keys activated. The circuit is from a Radio Electronics from May 1965. The transistor must be equipped with a heat radiator.
This simple two-transistor receiver was found in Radio Electronics magazine from September 1960....
This circuit was obtained from the February 1992 Radio Electronics magazine. In it, a bar of 4...
This old integrated amplifier is from a Japanese publication from 1972. The integrated circuit is...