This 600-ohm output impedance circuit was found in a Radio Electronics from October 1963. The circuit uses PNP transistors of the time and is powered with a voltage of 12 V.
The indicator for this circuit is a 0 to 1 mA milliammeter. The operational is from the 70s, when...
We can use this circuit to connect low impedance microphones and even small speakers used as a...
The circuit shown in the figure was found in the Linear Applications Handbook by National...