Power supply build quality pictorial. part 2

[Behemot]

Re: Power supply build quality pictorial. part 2

With upgraded rectifiers, maybe arround 400 W

[Pentium4]

Re: Power supply build quality pictorial. part 2

With upgraded rectifiers, maybe arround 400 W

Shouldn't a GBU606 be able to handle around 400W? Although I don't know the kind of efficiency it gets. I think it's scary though that this thing comes with a 6 pin and 6+2 pin PCI-E connectors...

[goodpsusearch]

Re: Power supply build quality pictorial. part 2

With 2x680uF 200V input caps it can do 350W max, maybe 400W peak for some seconds.

Check the switching transistors.

[Behemot]

Re: Power supply build quality pictorial. part 2

I mean output ones, they are usually underrated.

[Pentium4]

Re: Power supply build quality pictorial. part 2

Oh okay. There are two KSH13009AL's. On the secondary there is a STPS304SCT and the other one is completely covered in glue....I'll try and scrape it off and list it here.

[Behemot]

Re: Power supply build quality pictorial. part 2

Seems like schottky, 30 A from the label. On which rails are these?

[370forlife]

Re: Power supply build quality pictorial. part 2

This is a very old CWT design, they do ok up to about 300W, but thats around their limit. This looks like it will do just that, looks like E13009L primary switchers and decently sized secondary rectifiers.

[Pentium4]

Re: Power supply build quality pictorial. part 2

If I recapped it, would it still only be able to do around 300W? I'm not sure, there is another one hiding behind glue and a coil, can't really read anything about it. Is this a half bridge unit?

[c_hegge]

Re: Power supply build quality pictorial. part 2

It would do 300W regardless of the caps. It is indeed a half-bridge.

EDIT: If you were going to mod it, I'd also bend the fins on the heat sinks outwards.

[Pentium4]

Re: Power supply build quality pictorial. part 2

It would do 300W regardless of the caps. It is indeed a half-bridge.

EDIT: If you were going to mod it, I'd also bend the fins on the heat sinks outwards.

I wonder if I could replace the schottky's with the ones I just took off of my Bestec, or would that not work cause it was a Single Transistor Forward design?

[Behemot]

Re: Power supply build quality pictorial. part 2

Thats not a problem, but if U intend to use two in paralel to increase efficiency, use always pair of the same ones.

c_hegge: As for the half bridge, how do you increase output power, is it possible by increasing the coil size?

[c_hegge]

Re: Power supply build quality pictorial. part 2

You would have to increase the capacity of a lot of things:
- The switching transistors
- The secondary rectifiers
- Possibly the heat sinks
- The drive transistors
- The Primary caps
- The Transformer
- The Coils

[Behemot]

Re: Power supply build quality pictorial. part 2

Well I guess transistors usually have enough capacity (we talk about like +0,3 A on 315 V, right), about rectifiers we already talked (that also affects heatsinks), primary caps affect mainly micro-blackouts of the power net and the transformer does not look SO bad to me I mean 400 W combined ofc

[Th3_uN1Qu3]

Re: Power supply build quality pictorial. part 2

Transformer looks like it'd do 400. Depends on the secondary diodes.

[tom66]

Re: Power supply build quality pictorial. part 2

This "thing" shows up.

It's got a bridge rectifier, but it's pathetically small. The main caps are 330uF, but they look the same as the fake 330uF's, so they probably are fake. (=220uF) I'll test them when I get some time. Oh, and of course, no line filter. Wonder who made this one...?

Claims 3.3V at 14A, 5V at 35A(!), 12V at 17A and 5VSb at 2A.

Output caps are two 330uF 16V on 12V. (I kid you not! - one each side of pi coil.) Two 470uF 10V on 5V and also two 470uF 10V on 3.3V. The -12V gets 470uF 16V and -5V gets 470uF 10V. 5VSb gets 470uF. Pathetically small! Output caps are Fujhhyjyuu, first time I have seen these in any equipment.

[Behemot]

Re: Power supply build quality pictorial. part 2

Bridge rectifier is 2 A, that equals 650 W with 325 V, thats not so bad, no? Its even big enough to work under higher load cause it will stay cooler. I have seen one joke rectifier with quarter the thickness and rubber electrodes which also begun to drop output current at just 75 °C

[Heihachi_73]

Re: Power supply build quality pictorial. part 2

Seventeam ST-230WHF AT power supply (w43/96). Still works perfectly along with the Pentium 150 system it was powering.

One good thing about this PSU is that both the AC mains voltage and fan have clips instead of being soldered directly to the board. Nothing more annoying than something that requires desoldering or wire cutters just to take it out of its enclosure.

Output: 5V 16A, 12V 12A, -5V 0.3A, -12V 0.5A

C5: Matsushita (Panasonic) UP 330uF 200V 85°C 6122C
C6: Matsushita (Panasonic) UP 330uF 200V 85°C 6122C
C7: JPCE-TUR 2.2uF 50V 105°C
C8: JPCE-TUR 2.2uF 50V 105°C
C14: *not populated*
C15: JPCE-TUR 1000uF 16V 105°C
C16: JPCE-TUR 220uF 10V 105°C
C17: JPCE-TUR 220uF 10V 105°C
C18: JPCE-TUR 470uF 16V 105°C
C19: JPCE-TUR 470uF 16V 105°C
C21: JPCE-TUR 10uF 50V 105°C
C22: JPCE-TUR 1uF 50V 105°C
C24: JPCE-TUR 1uF 50V 105°C
C25: JPCE-TUR 330uF 35V 105°C
C28: JPCE-TUR 2.2uF 50V 105°C
C29: JPCE-TUR 2.2uF 50V 105°C

[tom66]

Re: Power supply build quality pictorial. part 2

One thing I noticed about the V-Spec PSU is that it is "thermally controlled" - presumably that refers to the fan. Indeed, there is a place for an NTC thermistor, but it is replaced with a piece of wire, so the fan runs full speed all the time.

[Jooo]

Re: Power supply build quality pictorial. part 2

Providing pictures of three random / unknown brand 350W PSU's in the next three following posts. These are always interesting IMO...

The models of the PSU's:

1. Deltaco PSU-215 350W

2. SilverPower SP-350PSF

3. Altis ATX-350-PT (EC)

[Jooo]

Re: Power supply build quality pictorial. part 2

First off, the Deltaco PSU-215. Caps were mostly Teapo. Nothing too interesting here...