It is a 13.8 V x 10 A regulator obtained in a 2008 documentation. The 2N3055 transistors must be mounted in excellent heat sinks and the voltage is adjusted in the trimpot.
By connecting several photocells in series, we can directly activate a sensitive relay, as shown in...
The purpose of this circuit is to provide a constant current to an experimental electromagnet. The...
Found in Linear Technology documentation from the 90s, this circuit uses components from that...