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 old documentation but can be applied to modern equivalent components. The...
In the figure we have a simple signal tracer circuit to be coupled to the volume control of an AM...
This signal amplifier for ATV in the 427 to 439 MHz band was found in a magazine 73 for radio...