This amplifier stage without an output transformer was found in Radio Electronics magazine from October 1963. The supply is 12 V, and the output is 8 or 16 ohms.
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...