This circuit is from a Radio Electronics from October 1970. The circuit uses transistors from that era and has a low impedance output. The resistance R1 depends on the impedance of the input signal.
In the figure we have a circuit in which two moving bar/dot indicators are connected together to...
This simple unregulated half-wave font was found in old American documentation. The diode is...
This simple radio for listening to a headphone with two CK722 transistors was found in Radio...