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Old 07-17-2017, 03:18 PM   #2741
goontron
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Default Re: Power supply build quality pictorial. part 2

Here's a surprising one. Modem PSU, 10v, one and a half amps. Its a bodge-job replacement for a real POS. http://www.badcaps.net/forum/showpos...postcount=1326

Case shot.

Not inspiring....

Board topside.

This is promising! Good insulation, no Brown Gorilla Snot, plenty of filtering. Looks like the board has provisions for another rail. Actual safety rated caps.

Topside-BottomWise!

No bad solder. Plenty of isolation. Not bad.

And the Money-Shot!

Decent Chemi-Con caps.
Secondary Filter: 1000uF, 16v.
BootStrap: 47uF, 50v.
Primary Filter: ? It was wrapped in yellow tape... Very large though.

Goontrons rating: B for beautiful. Needs more heat sink, and the primary cap is resting on some large resistors. More than satisfactory for its intended use. Looks Delta OEM.
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Last edited by goontron; 07-17-2017 at 03:26 PM..
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Old 07-18-2017, 12:48 AM   #2742
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Default Re: Power supply build quality pictorial. part 2

I'd guesstimate that primary cap around 47 uF/400 V.
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Old 07-18-2017, 09:33 PM   #2743
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Default Re: Power supply build quality pictorial. part 2

Quote:
Originally Posted by goontron View Post
Here's a surprising one. Modem PSU, 10v, one and a half amps.
...
Goontrons rating: B for beautiful. Needs more heat sink, and the primary cap is resting on some large resistors.
For a 1.5A adapter, the heatsinks look plentiful.

With those caps, I would have argued you give it an "A"... but it looks like it is a 2-transistor design. So in that case, "B" seems appropriate, as 2-transistor designs are not very efficient. The small cap on the primary may also be a "critical" cap... but again, I see nothing but good caps in this adapter, so that shouldn't be a problem.

A world of a difference compared to the gutless adapter you posted in the other thread.
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Old 07-18-2017, 10:10 PM   #2744
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Default Re: Power supply build quality pictorial. part 2

Quote:
Originally Posted by goontron View Post
Decent Chemi-Con caps.
Secondary Filter: 1000uF, 16v.
BootStrap: 47uF, 50v.
Primary Filter: ? It was wrapped in yellow tape... Very large though.
33-47u, 400V? Maybe 68u/400V.

Actually, since it's rated only up to 120V AC, the cap could be an 82u/200V unit.

Quote:
Originally Posted by goontron View Post
Goontrons rating: B for beautiful. Needs more heat sink, and the primary cap is resting on some large resistors. More than satisfactory for its intended use. Looks Delta OEM.
Agree! Looks rather non-RoHS-ey for 2011.
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Last edited by kaboom; 07-18-2017 at 10:12 PM..
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Old 07-18-2017, 10:54 PM   #2745
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Default Re: Power supply build quality pictorial. part 2

^ That was my thought. 82uF/200v.

I gave it a nice dose of 60/40 before i welded the case back together.
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