Found in Motorola's 1968 power circuit manual, this circuit has a high input voltage and no information was given about the transformers as the original types are commercial at the time.
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...