This circuit is from the 1982 SGS Linear Circuits Manual. The circuit provides currents from 35 mA to 1.5 mA set at P1 and Vref voltages at 26 V set at P2.
We found this circuit in a 90s 73 magazine for radio amateurs. The circuit has 3 W of power and can...
This circuit is from old American documentation, but the transistor used is still very common...
This circuit uses a simple power source, having been found in the Philips Databook of 1990....