Found in a Motorola's 1968 documentation, this circuit operates at 16.5 kHz. The output is 5 A. The transistors are from the era, admitting modern equivalents.
In the figure we have a simple signal tracer circuit to be coupled to the volume control of an AM...
This circuit was found in documentation from the 90s, using components from that time. The...
This circuit, obtained from old documentation, allows the recovery of sulfated batteries. The...