This 6-transistor Japanese radio for the medium wave range was manufactured in the 1960s in Japan. The circuit is superheterodyne with a 6 V power supply.
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...