[hpsdr] 48V 2000W Power supply

[Kjell Karlsen]

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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