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Documenting the replacing a bad capacitor in a PSU - Page 2

post #11 of 16
Thread Starter 
Nippon caps (and many others from Japan) are the greatest. I have some really vintage Nippon caps that are still good. I'm not surprised that the cheap no-name caps don't even test to spec when new. I suppose you can instantly tell the quality of a PSU just by looking at who supplied the caps smile.gif

EDIT: BTW, this was an "Ultra" V-Series 400w PSU. I've learned a lot about branded PSUs since then and won't ever make that mistake again. I'll only by ones with guts by Seasonic, HighPower or SuperFlower OEMs!

And off-topic, I'm very familiar with capacitors ;-)




Edited by FastMHz - 11/21/13 at 9:07am
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post #12 of 16
Quote:
Originally Posted by FastMHz View Post

Nippon caps (and many others from Japan) are the greatest. I have some really vintage Nippon caps that are still good. I'm not surprised that the cheap no-name caps don't even test to spec when new. I suppose you can instantly tell the quality of a PSU just by looking at who supplied the caps smile.gif

EDIT: BTW, this was an "Ultra" V-Series 400w PSU. I've learned a lot about branded PSUs since then and won't ever make that mistake again. I'll only by ones with guts by Seasonic, HighPower or SuperFlower OEMs!

And off-topic, I'm very familiar with capacitors ;-)


You posted that pic just to boast that you own a Simpson meter!

My only analog meter is a Radio Shack 28-4014 kit that my father bought but never assembled. Good meter, 50,000 ohms/volt:

post #13 of 16
Quote:
Originally Posted by FastMHz View Post

... this was an "Ultra" V-Series 400w PSU ...

Argh, in this review they found ****yyus aboard. Not an easy task to find worse caps than the ****yyus.

240465cdb6cbcac9.jpg

Look at how nocive crap caps are:
Quote:
Originally Posted by HardwareCanucks 

" ... The second the load increased, the o-scope reading went wild and registered a maximum of 100mV of ripple right off the bat. This is still below the 120mV allowed in the ATX but many will find it too close to comfort. On the other hand, when this power supply was pushed a bit more it absolutely shattered the 120mV mark by posting a reading of 135mV on the o-scope. Yikes ..."

http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/1464-ultra-v-series-400w-ultra-v-series-500w-power-supply-review.html

That murderous ripple can only have worsened with the years.

Quote:
Originally Posted by FastMHz View Post


WTH? You ghetto-modding a DeLorean or something? laughingsmiley.gif
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post #14 of 16
Quote:
Originally Posted by TELVM View Post


WTH? You ghetto-modding a DeLorean or something? laughingsmiley.gif

he can show you.... but then he'll have to kill you biggrin.gif

post #15 of 16
Thread Starter 
@larymoencurly - I think I had one of those RadioShack meter kits a long while back...wish I still did!

@TELVM - Unfortunately no DeLorean...just filtering the ripple from cheap power supplies for my rig is all tongue.gif

@psyclum - Nice! And not far off..that looks like a coil gun. I happen to use mine for an induction launcher, which is also a type of electromagnetic accelerator smile.gif

The Ultra PSU is a turd, definitely not worthy of the Nippon cap I put in.
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post #16 of 16
Quote:
Originally Posted by FastMHz View Post

The Ultra PSU is a turd, definitely not worthy of the Nippon cap I put in.
I bought one that was free after rebate and almost got my money's worth. 2 samples had these defects (not in both):

1. a pair of ground wires pulled out of the circuit board because they weren't soldered right.

2. all the components were coated with solder flux

3. the fan wouldn't start if the PSU was turned on in the cold.

4. a small upright capacitor in the low voltage section almost touched a high voltage wire. The manufacturer knew that was a hazard because in another sample they installed the capacitor horizontally to keep it well away from that wire:

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