This is the power supply circuit for the amplifier in the previous circuit. The source is adjustable and uses power transistors of the time. The AC transistor must be mounted on a heat sink.
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...