Power supply build quality pictorial. part 2

[momaka]

Re: Power supply build quality pictorial. part 2

20AWG wires for everything

When I see that in a PSU, I can be almost certain it's a cheapie.
200 W continuous, 300 W peak. Could probably do 250 W continuous, but it will likely run hot.

Also, in the event of a short circuit, those 20 AWG wires rarely hold up well. I have an L&C like that melt the wires without shutting down at all.

Also,the fan uses a 2 pin connector,but on this PCB (X-B2002 Rev:2.3) they seem to have traced the + pin to 5v as opposed to 12v on the Y-B200ATX versions.

Check where the (-) wire on the fan goes. Could be wired to -5V (to give 10V total). I doubt it, though.

I wasn't referring to the secondary section of the psu. The combination of 33 sized transformer and 470uF primary capacitors (assuming they are real 470uF caps and not 330uF) makes it a 250W power supply.

Exactly.

No comments on the Asus A-36F ?

Looks fine to me. Definitely okay for up to 300 W continuous (which should be good enough for a decent CPU and mid-to-high end graphics card)... Provided the 12V rectifier is rated accordingly, though.

[c_hegge]

Re: Power supply build quality pictorial. part 2

Yup, the primary side on yours (Dan81) will probably limit you to about 250W. pfrcom's unit has much larger 820uF primary caps and an ERL-35 transformer. His probably will handle 350W due to the beefier primary side. I'm guessing that the secondary side is probably a bit beefier too.

[Dan81]

Re: Power supply build quality pictorial. part 2

Yup, the primary side on yours (Dan81) will probably limit you to about 250W. pfrcom's unit has much larger 820uF primary caps and an ERL-35 transformer. His probably will handle 350W due to the beefier primary side. I'm guessing that the secondary side is probably a bit beefier too.

Oh well,at least can I trust it to run this rig? (given I install a beefier 12v rectifier):

Athlon 64 x2 5600+
GT440 1GB
2GB RAM
MSI K9N-SLi
1TB HDD
CD-RW\DVDROM & DVD-RW drive

[c_hegge]

Re: Power supply build quality pictorial. part 2

Yeah, it would probably work.

[momaka]

Re: Power supply build quality pictorial. part 2

Athlon 64 x2 5600+: 89W TDP
GT440 1GB: 65W TDP
HDD: 5-12W
total minimum 12V rail wattage: about 160W (13.3 Amps)
Multiply by a "fudge factor" of 1.5 to have some headroom for optical drive, chipset, RAM, and etc.
...
Total PSU wattage: 160 * 1.5 = 240 Watts. So yeah, that PSU should run it. Might get a little warm, though.

[Stefan Payne]

Re: Power supply build quality pictorial. part 2

Acquired these two recently - seem like reasonable quality to me - interested to know what the power supply aficionados think of them

Asus A-36F
First three pics - apologies for the blurriness
Teapos in the secondary look OK

Looks a bit like my ST-65ZF...

[Stefan Payne]

Re: Power supply build quality pictorial. part 2

Annyone know who did this unit?

Has all Fuhyyju and JunFu caps, though a decent Power Logic fan...

[Pentium4]

Re: Power supply build quality pictorial. part 2

Looks like it could be Jou Jye, not 100% sure though. What does the writing on the main transformer say? Do you have a picture of the label?

[Dan81]

Re: Power supply build quality pictorial. part 2

Maybe ATNG or Topower?

[Stefan Payne]

Re: Power supply build quality pictorial. part 2

Looks like it could be Jou Jye, not 100% sure though.

hm, could be. Seems pretty decent to me, what's your oppionion?

What does the writing on the main transformer say?

ERL39-10A, nothing more.

Do you have a picture of the label?

Nope

Says:
+5VDC/30A
+12VDC/14A
-12VDC/1A
-5VDC/0,5A
3,3VDC/14A
VSB/1,5A

No Combined power ratings...

Modelname is SH300A8H+P4.

Has an FCC Number though, D711121, but that didn't turn up anything...
Datecode seems to be from 2001, August...

[Pentium4]

Re: Power supply build quality pictorial. part 2

You know, this thing actually reminds me of a Sky Hawk PSU I saw a while back. I think it also had SH before the standard "EEL" markings on the transformers. They were pretty active as well back in 2001.

What are the switchers, 2SC2625?
Input capacitors look like 820uF or even 1000uF.

I think it could do 350W no problem if it has those switchers. It'd probably need a 12V rectifier upgrade though if you wanted to use it in a modern system. Nice that it has at least PPFC. I bet if there's two slots for 12V, two schottkys would probably bring this thing over 80% efficiency on 230V.

I like that it uses a Power Logic fan. Is it sleeve bearing or ball bearing?

[Stefan Payne]

Re: Power supply build quality pictorial. part 2

Switchers are 2SC3320 (or something like that)
Input caps are indeed 1000uF, but those F-thingys...

I didn't see a slot for a second +12V Schottky, just one it seems...

And the fan is a sleeve bearing, of course

But yeah, it is a Sky Hawk PSU...

[Pentium4]

Re: Power supply build quality pictorial. part 2

Switchers are 2SC3320 (or something like that)

Whoops, that's what I meant, the 15A ones. 15A is plenty for 300W. It's probably down rated because the airflow must be atrocious in that thing.

Input caps are indeed 1000uF, but those F-thingys...

Yuck. Should be fine in the voltage doubler though, the only place Fuhjyyu can last.

It does look pretty good. If you're going to use it, I'd oil that sleeve bearing fan. If you were thinking about tossing it, I bet you the member goodpsusearch would gladly pay you shipping for it

[Behemot]

Re: Power supply build quality pictorial. part 2

Seems like some FSP too.

Connecting primary and secondary heatsink, yeah baby! Is there any insulation?

[Stefan Payne]

Re: Power supply build quality pictorial. part 2

naa, just a plate between those two and the screws, no insulation of any kind.

[Dan81]

Re: Power supply build quality pictorial. part 2

Final guess from me would be Hipro.

Anyways,I found a quite similar PSU:
https://www.badcaps.net/forum/showth...&pp=40&page=28
It's the Modecom on the top.

EDIT:Finally found the oem of both - Dee Van Electronics. Notice the DVE logo on the Modecom label. I googled the Skyhawk's label and it has it as well. (look for a small triangle with the DVE letters in it)

[Stefan Payne]

Re: Power supply build quality pictorial. part 2

Something different. The OEM was more or less easy to find -> used their UL File Number on the label.
This is a 250W PSU. Guess who did it ;-)

[Pentium4]

Re: Power supply build quality pictorial. part 2

Hmmm. Looks like an old Bestec

[Stefan Payne]

Re: Power supply build quality pictorial. part 2

That's because it is

Got those two with another FSP one, all rather old (pre Y2K ones, it seems).

[Pentium4]

Re: Power supply build quality pictorial. part 2

Yeah, looks like 1998. I think it looks good for 250W. They were a little ahead of their time for a low end unit, not using half bridge in 1998. Funny how their cap choice was better 17 years ago. CEC>CapXon