So I was walking the swap meet the other day and I found this old PSU...
its an adjustable linear supply 0-34v, 1.5A. Its pretty old and crusty but for 8 bucks the transformer alone was worth the cost, especially with all those taps. Its based on a 3n3055 power transistor, the build quality inside looks pretty nice, the axial components are sleeved around there leeds, there is what looks like a huge GE cap (maybe oil based) almost half the size of the transformer inside.
I haven't stripped it down any farther than this, I plan to tear it totally down and clean it up after the baby goes to sleep tonight! Ive been wanting to build a digital adjustable voltage supply with current limiting for a while. I figure this could be a good clean linear base supply for the project. All you would have to do is add the current limiting and a micro to this bad boy.
Ive got to say Im a bit worried about plugging it in though. I cant find any manual for it, but from an image search those pins for -out, -sense, +sense, +out, and AC in originally had clips like the ones used to hook up speakers. Thing just had a mains wire shoddily soldered to the AC pins when I bought it, and as you can see in the picture all the DC out and sense pins are soldered togather with a little wire. I originally thought those sense pins were for current, but I dont see any kind of a shunt resistor anywhere near them.
Does anyone know about this psu, have a manual, or can just tell by looking at it what + and - sense do and how they are suppose to be used (i.e read with a meter or something else)? Also this thing looks pretty tough and the parts are pretty good quality from what I can tell, would this make a pretty clean supply? Originally I was going to use a 24v radio shack transformer with some switching regulators to pre track adjustable linear regulators, but if this is a working good quality clean DC power supply i may as well clean it up and use it instead.