[hpsdr] 48V 2000W Power supply

[Owen, Michael]

Dear friends,

There are lots of 2kW-3kW 48-50VDC power supplies on eBay under "rectifiers."  I don't know why they call them that.  They are good quality switching power supplies; sometimes their connections are easier than supplies for blade servers.

W9IP

-----Original Message-----
From: hpsdr-bounces at lists.openhpsdr.org [mailto:hpsdr-bounces at lists.openhpsdr.org] On Behalf Of Mike Seguin
Sent: Wednesday, December 11, 2013 12:37 PM
To: hpsdr at lists.openhpsdr.org
Subject: Re: [hpsdr] 48V 2000W Power supply

***** High Performance Software Defined Radio Discussion List *****

Hi Kjell,

Quite a few of us use this type of supply from HP. (watch the wrap)

http://www.ebay.com/itm/HP-226519-001-spares-253232-001-2950w-power-supply-f-BLADE-enclosure-BL20p-/370956188128?pt=PCA_UPS&hash=item565eb639e0

There is a smaller version.

Typical use is in applications like this:

http://bigskyspaces.com/w7gj/Platinumi-1.pdf

Mike

---
73,
Mike, N1JEZ
"A closed mouth gathers no feet"

On Wed, 11 Dec 2013 14:22:40 +0100, Kjell Karlsen wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi All.
>
> I am working on a 600-1000W PA using the newest LDMOS transistors from
> Freescale. I tested MRFE6VP61K25H and got >600W PEP output with good
> linearity, IM3 better than -30 dBc rel. to each tone. I had only a 48V
> 750W PSU so at 15A, the voltage started to drop.
>
> I have searched on Internet to find a 2000W PSU and found one meant
> for  use on base stations for Mobile Communications. It is constructed
> by ELTEK  in Norway but it is made in China. There are several company
> that sells  it. I have bought one and it arrived yesterday. It looks
> very  professionally made and it works fine, I tested it with 20A
> load, so far  no problem.
>
> It is built to be hot-plugged into a rack and deliver power together
> with  several units. It is controlled by a CAN Bus but can be used
> without any  control connected. The voltage is set by the manufacturer
> to 53,5V and can  deliver 37,4V.
>
> The connector interface can easily be home made using a piece of dual
> sided PCB. By using a sharp knife I made a connector in less than an
> hour.
>
> It has a soft-start and there are two small temperature controlled
> fans  for cooling.
>
> The Part name is: Flatpack2 2000W 48V. Input voltage is universal
> 100-250VAC.
>
> The size is: W=110mm, H=43mm, D=332mm.
>
> If someone is interested, I´ll send you the name of the company I got
> it  from.
>
> 73, Kjell


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