The circuit is of the Motorola Linear Databook of 1990. The power source must be symmetrical and the characteristics of the circuit are given next to the diagram.
This circuit controls a heating element with voltage from 6 to 30 V and current up to 3 A from...
Indicated to operate in tube circuits, this preamplifier has 250 V power supply. The circuit is...
We found this circuit loader in a French magazine Electronique Radio Plans from July 1993. The...