With only 1% distortion, this Motorola amplifier found in a 1968 documentation makes use of period components. The frequency response ranges from 10 Hz to 100 kHz.
This protective circuit for power lines was found in a Radio Electronics from November 1957. The...
In the figure we have an old circuit for controlling two low-power lamps. The circuit is from...
What differentiates this circuit from the previous one is the need for a much smaller current to...