This power supply uses a Raystor which is a 1964 LDR lamp coupler. The circuit was found in an Electronic Design and the transistor can be replaced with the current equivalent.
Mouser Electronics is making available the new regulator type Buck FAN536600 from Fairchild for...
We found this circuit in an American 1980s documentation. Transistors may be general purpose...
This complete single cell protection system is suggested by Linear Technology in its 2005 manual....