This electronic rheostat with SCR was found in the June 1964 Radio Electronics magazine. The SCR may be a modern type and the 2W potentiometer may be 470 ohms.
A negative floating regulator capable of supplying an output voltage of -100 V with regulation of 20 mV for...
Found in American documentation from the 90s, this circuit converts 28 V to 155 V with a frequency of...
We found this circuit in a 1997 documentation. Its purpose is to fan an inverter for fluorescent lamp...