This sensitive receiver for the medium wave range was found in Radio Electronics magazine from December 1960. The circuit has a headphone output and is powered by just 3 V.
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...