Found in documentation from the 1980s, this circuit uses a SG1524. It is an uncommon integrated circuit nowadays. The circuit provides a current of 20 mA with a symmetrical voltage between 15 and 18 V.
This circuit is from an American technical documentation from the 70s, but it can be easily...
Found in the April 1980 issue of Radio Electronics magazine, this stage uses transistors from the...
This circuit was obtained from an American documentation from the 80s. Integrated circuits are...