Below I have attached some pics of a circuit that was salvaged from something a while ago. From what I do not recall. It’s obviously intended for some sort of power regulation. Considering my in experience I cannot tell for what. I have searched for all of the numbers on the PCB itself and have come up with zilch. The components that you will see in the pic are as follows:
D1616 NPN Transistor x2
4.7K resistor x2
104J capacitor(0.1uf) x1(the red one)
27J/3Kv capacitor x1 (the blue one)
Unknown 10 pin xfmr marked as 81-4000-9104. The second line reads: C.E.I. 9738 A cautionary “High Voltage” is also printed on the PCB right next to it.
A copper wire wrapped cylinder that I assume is an inducer?
Also there is a +&- wire soldered on with a two pin connector labeled CN1. I’m guessing that this is the input. There is also a slightly larger two pin female labeled CN2.
Another intriguing marking is just below the lower NPN. It reads: “TAC H 94V-0”
I’m very curious as to what this circuit does and how it does it. I’m probably incorrect in my assumption that it is stepping up the input voltage to 94VDC but that is my only guess. Also why the NPNs?
I’d like to attach it to my bench PSU but I thought it prudent to ask a few questions first. If it does what I think it does I may find some use for it in the future.