This circuit was found in a 1965 Electronic Design. Transistor Q2 must be load dependent. The circuit can be adjusted for currents from 1 to 10 A. The voltage drop is 3 V and the maximum voltage is 35 V.
This is the circuit of a hearing aid amplifier manufactured by Sony in the 1960s. The circuit was...
Here we show a configuration in which we have a control voltage applied from a voltage divider, which...
This circuit was found in Motorola's 1968 documentation. The SCRs are then replaceable with...