Widetech "The Max" 550

[c_hegge]

I took two of these home from work a few weeks back, boith wer pulled from customer's PCs. My boss didn't want them , thinking that they were probably just cheap generics no-name units. After opening one up I found this:


Well, Widetech didn't try that hard to hide the OEM. It's from the Great Wall of China (pun very much intended), although it looks like the flash on my camera hid the logo. It's actually just near the AC in socket. Looks like we have an ERL 35 transformer and reasonable heat sinks


Horrible Electrolyitc Capacitors on the primary *sigh*


Nicon on the secondary *sigh*. The rectifiers used are 30A for the 5V, 16A for the 12V and 20A for the 3.3V. The fan is wired straight to 12V


Speaking of fans, it's an off-brand - ever cool

but wait a minute let's just get a better look at that primary heat sink...

Well, I'll be darned. The only transistors there are the main switchers, no 5vsb transistor to speak of, just an NCP1014 chip in it's place. looks like we don't have a two transistor 5vsb circuit.

I reckon it just needs some better caps and maybe a fan controller and some better rectifiers on the secondary and it would be half decent as a 300 Watter.

[ratdude747]

Re: Widetech "The Max" 550

yay! a properly engineered 5vsb!

IMHO, you ought to recap it... good for gerneral purpose machines.

[c_hegge]

Re: Widetech "The Max" 550

That's exactly what I intend to do

[b700029]

Re: Widetech "The Max" 550

Not bad at all. Could probably do 400W peak, 350W continuous (depending on what the primary switchers are).

[c_hegge]

Re: Widetech "The Max" 550

they are 13009 knock-offs. I'll find a datasheet when I get around to it

[Th3_uN1Qu3]

Re: Widetech "The Max" 550

Will do its labeled rating if you put some proper diodes in the secondary.

[c_hegge]

Re: Widetech "The Max" 550

They are rated at 12A

I'm gonna replace the secondary rectifiers with 30A schottky rectifiers (I'll leave the 30A schottky on the 5v rail in place).

[370forlife]

Re: Widetech "The Max" 550

Greatwall is actually a fairly competent OEM who is currently pumping out some very good units:

http://www.jonnyguru.com/modules.php...Story&reid=262

http://www.jonnyguru.com/modules.php...Story&reid=238

http://www.jonnyguru.com/modules.php...Story&reid=212

[b700029]

Re: Widetech "The Max" 550

Greatwall is actually a fairly competent OEM who is currently pumping out some very good units:

http://www.jonnyguru.com/modules.php...Story&reid=262

http://www.jonnyguru.com/modules.php...Story&reid=238

http://www.jonnyguru.com/modules.php...Story&reid=212

All the CM6800/6802-based supplies have a little blip in the turn-on voltage curve, which I believe is caused by the active PFC circuit.

[c_hegge]

Re: Widetech "The Max" 550

A few modifications later, we now have 30A schottky rectifiers on ALL of the rails, Nichicon HE, Panny FR and Samxon RS caps, sleeved cables and a fan controller.

[c_hegge]

Re: Widetech "The Max" 550

I gave one of them a really cool (pardon the pun) mod to the fan. In fact, I think it look so cool, I can't help but show it off - 20 LEDs in the fan - that's more than an Enermax Apollish.

[mockingbird]

Re: Widetech "The Max" 550

Your fan controller, where did you get the design from? Also, you mentioned 3 different series. did you not worry about keeping the ESR the same?

[ratdude747]

Re: Widetech "The Max" 550

I gave one of them a really cool (pardon the pun) mod to the fan. In fact, I think it look so cool, I can't help but show it off - 20 LEDs in the fan - that's more than an Enermax Apollish.

ratdude smells rice... am i at an asian buffet?

[shovenose]

Re: Widetech "The Max" 550

I gave one of them a really cool (pardon the pun) mod to the fan. In fact, I think it look so cool, I can't help but show it off - 20 LEDs in the fan - that's more than an Enermax Apollish.

You turned that shit into an awesome PSU! lol!
You seriously should make a "Callum Power" psu company.

[c_hegge]

Re: Widetech "The Max" 550

Your fan controller, where did you get the design from? Also, you mentioned 3 different series. did you not worry about keeping the ESR the same?

I scavenged the fan controller from a Deer which I exploded on the tester.

I didn't worry too much about keeping the ESR the same. If it does 300W in spec, I'll be happy. Besides, These obscure no-name cap brands, probably don't even have websites, so I don't know what the ESR of the originals was. See if you can find the website for nicon

EDIT: Fan controllers are easy to make. There's an easy design at http://www.heatsink-guide.com/conten...=control.shtml

[c_hegge]

Re: Widetech "The Max" 550

You turned that shit into an awesome PSU! lol!
You seriously should make a "Callum Power" psu company.

Remember the CH PC Power MOD-400?

[mockingbird]

Re: Widetech "The Max" 550

No, I meant keeping the different brands of new caps the same ESR...

[c_hegge]

Re: Widetech "The Max" 550

No, I meant keeping the different brands of new caps the same ESR...

No, I didn't bother, I just used what I had on hand.