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Old Dec 22, 2011, 11:38 PM
shalom72c is offline
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Help ! Need power supply : questions


Hi Everyone ! Happy Holidays !! I need to find a reasonable cost server power supply to mod that can put out 13-13.8VDC (max) with a min of 20-30amps . It is for using with a ham radio transceiver. Could some one please point me in the right direction to find a power supply and help to get the needed mods done. I have been in RC off and on over the last 10 years .
Thanks !
Bill C.
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Old Dec 23, 2011, 12:08 AM
Cougar Zeke is offline
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Ennnnncommmming!!!!!
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shalom- I'm no expert, but I think you would be better off with a regular computer power supply. A cheaper, easier solution IMO
Old Dec 23, 2011, 12:35 AM
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Server supplies are superior to standard ATX computer supplies in nearly every way. They're more robust, easier to convert, have more stable power output, and are dramatically cheaper.

That said, ALL server supplies (as well as all ATX supplies) are switchers and may introduce undesirable noise when used to power amateur radio equipment. Since they're cheap, you have little to use in trying though.

Go to the following thread and do a little searching. You should quickly find a suitable supply that is capable of adjusting voltage above 13 volts (most are 12.0-12.5V standard).

https://www.rcgroups.com/forums/show....php?t=1292514

Welcome to RCGroups, Bill!

Mark
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Old Dec 23, 2011, 07:02 AM
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ancora imparo
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Just don't post any questions on that thread. It's a reference thread and the moderator is a grumpy old bastard.

Post any questions on this thread where all the nice experts hang out.

John
Quote:
Originally Posted by mrforsyth View Post
Go to the following thread and do a little searching. You should quickly find a suitable supply that is capable of adjusting voltage above 13 volts (most are 12.0-12.5V standard).

https://www.rcgroups.com/forums/show....php?t=1292514

Welcome to RCGroups, Bill!

Mark
Old Dec 24, 2011, 02:49 PM
KiloOne is offline
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Dale Kramer
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Just a thought


I've contributed to both threads and think they are a great resource.

However, I've been searching for a couple hours now and haven't had any luck trying to find out if there is a supply that suits my current need.

Is there any web service that hosts spreadsheets that multiple users can update?

It would be great to have sortable columns like part#,dimensions,weight,watts,amps,voltage adjust(Y/N),low V limit,High V limit,floating outputs(Y/N),floating outputs possible (Easy,Med,Hard),fan speed notes,link to build thread etc.

Dale

P.S. Does anyone know of a supply that can give around 60 amps, floating outputs and a voltage adjustable down to 11.2V?
Old Dec 24, 2011, 03:47 PM
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Quote:
Originally Posted by KiloOne View Post
Is there any web service that hosts spreadsheets that multiple users can update?
Google docs!

Quote:
Originally Posted by KiloOne View Post
It would be great to have sortable columns like part#,dimensions,weight,watts,amps,voltage adjust(Y/N),low V limit,High V limit,floating outputs(Y/N),floating outputs possible (Easy,Med,Hard),fan speed notes,link to build thread etc.
Yes, it would be great. As of right now, the best resource that I am aware of is the (other) excellent thread that John (JJ604) started: https://www.rcgroups.com/forums/show....php?t=1292514

Mark
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Old Dec 24, 2011, 07:38 PM
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Hi,
No, I just can't remember what frequency I chose that would fool the power supply into thinking the fan was running. When I first tried it, I chose a ridiculously high frequency which the supply figured was a problem with the fan and it would shut down. Any frequency that the supply accepts is the right one.
That said, be sure to cool it properly, as it now has no way (short of onboard temp sensors if equiped) to know if there is a cooling problem.



Quote:
Originally Posted by 376782 View Post
Hi Keith;

Not clear whether you are looking for a slower fan that would output the same frequency feedback pulses or plan to use your 555 IC to emulate the feedback signal. If you do find slower fans that output the same frequency (approx. 330 HZ) let me know. At the present I have disconnected the feedback and replaced it with the 555 CCT as in post #1071. The fans are connected in series to run much slower and can be selected to high speed with a DPDT switch.

Dave
Old Dec 28, 2011, 10:19 PM
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I can pick one of these up in Canada and save a good bit on shipping. Would either work for my GT power A6-10 200watt 10amp charger. I don't plan on ever having any more then 2 chargers at some point in time. I have 14 batteries so I will have flying time while waiting for them to charge.

Are they quiet or loud. I plan on putting them in a Plano aluminum case .

HP DL380 G4 / DL385 G1 Server Power Supply 575W S/P 406393-001 / 321632-501

HP DL380 G3 Server Power Supply 313299-001 / 313054-001

or I can get 2 of these off Ebay
Last edited by nitris223; Dec 28, 2011 at 10:47 PM.
Old Dec 29, 2011, 06:26 AM
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ancora imparo
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nitris, according to your picture of the label, the Lucent supplies only do 10A at 12V. that's 120 Watts. Pretty useless. Their big rails are the 3.3 and 5V ones. No use to us.
Quote:
Originally Posted by nitris223 View Post
I can pick one of these up in Canada and save a good bit on shipping. Would either work for my GT power A6-10 200watt 10amp charger. I don't plan on ever having any more then 2 chargers at some point in time. I have 14 batteries so I will have flying time while waiting for them to charge.

Are they quiet or loud. I plan on putting them in a Plano aluminum case .

HP DL380 G4 / DL385 G1 Server Power Supply 575W S/P 406393-001 / 321632-501

HP DL380 G3 Server Power Supply 313299-001 / 313054-001

or I can get 2 of these off Ebay
Old Dec 29, 2011, 01:56 PM
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So what about the other 2 DL 340's . I think the G3 is 350 to 400 watts and the G4 is 575 watts and this was some of the specs were model DSP-600 PBB Esp-135. Would those work. I can also get my hands on a IBM eServer 345x345 350 watt. I can't tell how big or small these thing are from the picture. Are they quiet or loud.
Last edited by nitris223; Dec 29, 2011 at 02:09 PM.
Old Dec 29, 2011, 04:36 PM
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ancora imparo
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The G4 you list looks like the EP600 supply. Plenty of info on that in this thread.
It's powerful enough and fairly quiet. You can control the fan speed if it is the same as the ones in this thread.

https://www.rcgroups.com/forums/show...369612&page=39

Quote:
Originally Posted by nitris223 View Post
So what about the other 2 DL 340's . I think the G3 is 350 to 400 watts and the G4 is 575 watts and this was some of the specs were model DSP-600 PBB Esp-135. Would those work. I can also get my hands on a IBM eServer 345x345 350 watt. I can't tell how big or small these thing are from the picture. Are they quiet or loud.
Old Dec 29, 2011, 05:52 PM
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Thanks jj604. I think I will snag a couple of them. They look pretty simple to wire up and there is lots of post about that model.
Old Jan 01, 2012, 05:04 PM
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adjust voltage model 7000814-0000


Hi guys,

don't know if I missed it somewhere but how can I adjust the voltage of a dell model 7000814-0000 power supply. I have got it running with a voltage of 11.94V.

Somewhere I read to attach b4 to positive, and that should raise the output voltage to 12.5 volts. Looking at the overview of the pin connections I see b4 is a + 3v3 standby. To which connector do I connect it and will it work or does the power supply go up in smoke?

Regards,
Jarco
Old Jan 01, 2012, 08:02 PM
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Steven
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Hey jarconman,

there seems to be only one way to increase output voltage for the 7000814-0000 PS.
Using a 470 ohm resistor between pin A2 (+12V Current share) and +V out will increase voltage from 11.94v to 12.5v.

https://www.rcgroups.com/forums/show...&postcount=724
Old Jan 08, 2012, 02:37 PM
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Can you put two of these in series. Im running 2 dl580s in series the 100 amp ones. but those are only putting out 25 volts in series. With the powerlab chargers they require 30 volts or more to get the max wattage capability of the charger. So with these power supplys you can run them at 15 volts just fine so in series they would work. Another question does anyone know how many amps these pull off a 120v line.


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