This audio circuit was published in a Rado Electronics issue from October 1963. The transistors are from the time and the output is low impedance. Power is supplied with a voltage of 12 V.
This circuit provides an extremely stable, temperature-compensated reference current. The circuit is...
The figure shows how to obtain a higher output current for an operational amplifier. With the...
This circuit was found in Radio Electronics magazine from June 1958. The maximum distance depends on...