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What happened to my power supplies??

post #1 of 4
Thread Starter 
Here's one for you..

This isn't the power supply in the normal sense. I'm talking about these:



I borrowed these from the university and I was using them to power my roommate's subs in our room. They are 750W power supplies from 1983 that are wired in series from the 6V output on both of them to get 12V and they powered a 750W 60A hifonics car amp very nicely. They worked fine in the dorm room, but when i brought them back to my house they won't work.

I measured the voltage on them and one 6V output reads 0.17V and the other was fine for a while, but after a few power cycles (testing and comparing voltages and stuff) it now starts off at 6V when powered on but then decreases, so it's like the capacitors are charged once instead of continuously.





Anyone know what happened? I don't expect anyone to know exactly what is wrong with these ancient things, I'm just wondering if anyone can think of what could have happened to them.



Edited by gamer_013 - 12/19/08 at 11:18am
    
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post #2 of 4
bad/dead caps is all i can think of.... does is have any kind of over voltage protection and stuff like that?

LOL at "not UL recognized"
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post #3 of 4
Thread Starter 
Quote:
Originally Posted by theCanadian View Post
bad/dead caps is all i can think of.... does is have any kind of over voltage protection and stuff like that?

LOL at "not UL recognized"
I honestly have no idea, but they did work fine for about of month of 5-20 min periods of bumping. All i did was unhook them, took them on a 12 hour drive home and hooked them back up with no avail
    
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post #4 of 4
Thread Starter 
Hmm, what about my house not being able to power the PSU sufficiently? I noticed when turning one on, any lights in the same room flicker slightly. Back in the dorm they were both plugged into a surge protector which was plugged into another surge protector (we weren't overloading it, we were just using it as an extension cord kinda) and nothing flickered or blinked or anything when they were turned on. Could it be because the outlets at the university can handle their power draw and my house cannot? If that could be the problem is there a way I can overcome it?
    
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OCZ Vertex 4 256GB SSD LG DL DVD Burner Koolance CPU-380I EK Radeon R9-290 Acetal 
CoolingCoolingOSMonitor
Swiftech MCP 655 EK CoolStream XTX 360 Windows 7 Professional x64 24" Sceptre X24WG 
KeyboardPowerCaseMouse
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