Server converted power supplys.

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Re: Server converted power supplys.

Post by sonoma » 23 Jan 2018, 20:10

mine has a tag on it that says AC-DC power supply. model S-480-12
input 110 to 220 volts
says output 12volt -40Amp. it actually puts out about 33 amps on constant running and will surge up just a little higher. only had 1 amp that on high would kick up close to the 40. it also has a auto reset if you spike it to hard and resets its self.
here is a link to what I have. they have gone up a lot since I bought mine.. hope this will give you a good idea. there is one named mega watt that is a little more expensive that sells over here in the US also.

https://www.ebay.com/itm/DC-12V-40A-480 ... SwkzhZznqn

here is the mega watt supply. like I mentioned a bit higher. he list it for amps and cb radios.

https://www.ebay.com/itm/400-Watt-9-15- ... SwjyhZ8krb

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Re: Server converted power supplys.

Post by Buick Mackane » 24 Jan 2018, 01:04

Was scouring ebay for some high current cable, Works out about £2 for 0.5m, Then i seen these :mrgreen:
http://www.ebay.co.uk/itm/MasterStor-Ju ... Sw8gVX9Nvz
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Re: Server converted power supplys.

Post by sec1223 » 24 Jan 2018, 06:25

these are the dogs bolloks... 13.5+ volts@about 70 amp, or 82a@12v

https://www.ebay.co.uk/itm/HP-DL380-G5- ... SwKnFaYLmY
cant stand IGNORANT b******ds

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Re: Server converted power supplys.

Post by wa10 » 24 Jan 2018, 19:08

Cheap jump start cables are usually aluminium wire, it works but you need crimp on connectors

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Re: Server converted power supplys.

Post by kilimax » 24 Jan 2018, 19:10

sec1223 wrote:
24 Jan 2018, 06:25
these are the dogs bolloks... 13.5+ volts@about 70 amp, or 82a@12v

https://www.ebay.co.uk/itm/HP-DL380-G5- ... SwKnFaYLmY
I have the 1200 watt version of this. 12V @ 100A . It's a stonker :D
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Re: Server converted power supplys.

Post by kilimax » 27 Jan 2018, 12:45

Thought I would post an update on my HP DPS-1200FB 1200 watt converted server power supply.

Since building this, I've been using it almost daily to power up radios and other accessories and while I'm very pleased at how it performs, I've always been a little disappointed with the output voltage. While I know that for general use, +12.4 volts is perfectly adequate, my main use for this supply is for powering my RM HLA-300 Linear amplifier. This amplifier draws over 40A at 13.5 volts and when I initially tested it, I noticed that under load, the amplifier was down in power by about 75 watts at 12.4 volts,

Having read about a modification in this thread that raises the output voltage, I decided to undertake the mod and I now have a power supply that sits at 13.53 volts. The mod is really straight forward. Remove the variable resistor and replace it with a fixed value. I selected 1.68K to get to 13.53 volts.

A quick test of the amplifier and low and behold, it now draws 45A and is producing about 70 watts more than it had been.

Sorted! :D

Image showing variable resistor replaced with a fixed value (I used 2 resistors to get the value needed)

Image

Output voltage sitting at 13.53 volts

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Re: Server converted power supplys.

Post by sec1223 » 27 Jan 2018, 13:35

good work
cant stand IGNORANT b******ds

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Re: Server converted power supplys.

Post by kilimax » 27 Jan 2018, 13:47

sec1223 wrote:
27 Jan 2018, 13:35
good work
Thanks :thumbup:
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Re: Server converted power supplys.

Post by Buick Mackane » 27 Jan 2018, 14:32

Nice work drew,


Well iv'e stripped mine down and can confirm that it doesn't have any internal potentiometers for adjusting voltage etc, Although there is another model of this PSU (NPS-700AB) Which does have internal pots for adjusting output voltage, The one i have is model (7000814-0000) Both power supplies look identical, So if your planning on converting one of these make sure you go for the NPS-700AB Model,

The two large screws in the first pic supply the output voltage, So rather than solder wire to the terminals on the front panel i'll just clamp some heavy cable to the two output screws


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Image

Image
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Re: Server converted power supplys.

Post by Buick Mackane » 08 Feb 2018, 20:08

Some info for anyone thinking of converting a dell 2850 supply, You might find yourself scratching your head over how to lower the speed of the (very loud) fan, Theres conflicting info on the net on how to do this, But heres how you do it,

Short pin (B2) To the pin above it (C2) Makes a big difference,

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Re: Server converted power supplys.

Post by sureshot » 17 Feb 2018, 01:08

Been a while since I tried something different. There's a surplus of old dell power supply, the black brick. There are two models, one is 12.5 Amps at 12 Volts, the other is 18Amps at 12 Volts.

Picking up the later for less than £10 I thought I'd give it a go. I've yet to test the plug (molex) and lead pin out. Going full hack I chopped the output lead off. It wasn't easy fitting binding posts, there's very little room inside the case for adding hardware. In the future I will post the plug pin out up. It might be a better option the use a project box and a female Molex chassis socket for any outputs. If you opt for binding post, expect a fight with the wiring.

So on finishing I put it on the radio and Amp I'm using, and shouted for some radio checks. A local fella a few towns from me answered my calls, giving me the thumbs up on signal and modulation. Out of the Xbox 360 and this dell, I prefer to modify the Xbox brick, just more room under the lid. This psu needs some more use to prove itself as sturdy. I've got a positive feeling its well made unit.

Anyway I will post the Molex plug pin out in a few days. For anyone wanting to opt for the project box route for connectivity.
More to follow. :)

PS, Resizing altered the pictures orientation, but you get the idea.
Molex pin out to follow. There is a couple of images on the web of the plug, but following that did not fire it up for me.
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Re: Server converted power supplys.

Post by sureshot » 17 Feb 2018, 22:42

The pin out for the converted dell psu above.
Dell D220P-01 DA-2 Series 12V 18A AC/DC Adapter .

Group all white + 12 Volt wires x 3.

Group all black ground wires x 3 Also add thin red, and thin blue, and bare ground wire to these 3 ground wires.

This will power up the supply, and current sense is connected. In this configuration you get the least voltage drop under load.

PS. Ignore the "to power on short wire 1" in the bottom left corner of the written sheet.
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Re: Server converted power supplys.

Post by sureshot » 05 Mar 2018, 00:23

Just a note on the various Xbox 360 psu's. The 150 watt and the 175 watt units seem to have one type or revision, although this is not conclusive.
The 203 watt units seem to have two revisions I've come across. One of the 203 watt units is reasonably straight forward to get in to, the other one of the 203 watt units poses much more of a task. You'll know if you modify more than one, as the heatsink runs the entire length of the inside of the casing. Also expect to get plastered in thermal compound. The later of the 203 watt units is doable, but expect a longer process. Also care must be taken not to trap the fan lead, it's screwed below the heatsink plate. The Xbox psu's are certainly worthy to modify, but there are several revisions out there. Also on a final check all the electrolytic capacitors, I nearly missed a vented 470uf 16V on the secondary in one unit. If it wasn't replaced there would have been terrible noise on the output.
Think I've been through few now. If your needs are no greater than 12 Amps continuous and 14 Amps for short periods, these might save you a few quid. :) :)
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Re: Server converted power supplys.

Post by sureshot » 09 Mar 2018, 23:20

Just an update on the Xbox bricks. I know it's gone on a bit, but I think a fare few people can make use of them for radio amplifier and even some scanner use. Your probably aware of the three main grey bricks of varying power ratings. What I didn't know is the plug to console configuration seem different with each unit, I was going to attempt to do the pin out on the 203 watt unit. Only because it gives breakout board options, but there are just to many variations in the plugs output.

Having scored a couple more grey bricks, I thought I'd add some photos how to get into the 203 watt model. It's not as straight forward as you might think. On the up side the wiring and start up is the same for all of them. If anyone wants the individual pin out of there grey brick to plug, you only need a multimeter continuity test to work out the pin out. Handy if you prefer the breakout board approach. In the near future I've got a different Dell to have a go at, it's a big current beast as well. Also something else in the smps offerings, something many people might be able to make use of. But I've got to verifie it's viable first. Sorry I can't be more specific at the moment, but that's to come. :)
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Re: Server converted power supplys.

Post by sureshot » 12 Mar 2018, 22:41

Just waiting on some epoxy to finish this latest idea...
Thought I'd give these a mention, pictures below. Don't chuck out your leads from stuff you might repurpose.
A good source of hook up wire for circuits in old leads, and reclaim the ferrite barrels. They can be used in other circuits as transformers, inductors, or just to attenuate noise. Sharp knife and a couple of drill sizes. Be careful if you clamp ferrites in a vice, they can easily shatter.
Should have another small offering in a few days. :)
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