[hpsdr] Amps for HPSDR

[Dan Habecker]

Here's some further information about the device and the 144MHz amp:

This the datasheet<http://cache.freescale.com/files/rf_if/doc/data_sheet/MRFE6VP61K25H.pdf>
from
Freescale.  Here<http://www.f1te.org/index.php?option=com_content&view=article&id=23&Itemid=49>is
where more info and pictures of the amp using a predecessor to the
MRFE6VP61K25H device.  (He later updated it with that device.)  And
here<http://www.rfham.com/index.html?c85.html>is where they are
offering a board kit and the device.

73,
Dan W9EQ


On Wed, Feb 9, 2011 at 7:12 PM, n3evl <n3evl at townisp.com> wrote:

> ***** High Performance Software Defined Radio Discussion List *****
>
> I couldn't find anything on Google on the mentioned device - but did find
> the DUBUS
> article [see: http://www.dubus.org/  and click on link for "current issue"
> ] which
> mentions device:
>
> MRFE6VP61K25H
>
> 73, Pete N3EVL
>
>
> On 2/9/2011 1:34 PM, lstoskopf at cox.net wrote:
>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> One of the difficult steps in getting high power with the HPSDR is that
>> the present line up puts out about 10 watts while off the shelf linears
>> require 30 t0 100 watts.  There has recently been a lot of discussion on the
>> moon lists about the DUBUS article using the MRFE6VP1K25  device for more
>> than 1 KW out on 144 MHz.  You can Google that and look especially at the
>> DUBUS supplement video.  4 watts drives it to full power.  A 6M version is
>> coming.  The 50 v supplies are readily available from used telecom -48 use
>> and I have two new in the box purchased on line at $30 each.  Awaiting an
>> application to see if SSB dynamic loads work with them.  Someone will surely
>> be out with a broadband HF board.  Neat thing about the device is that it is
>> designed for 65 to 1 SWR on the output before damage.  So in a short while,
>> I predict that we'll find that we are ready for a full rig.
>>
>> It is a $270 device and doesn't require too much in the way of exterior
>> parts.  I've been watching the usual dealers, Richardson, Digi-Key, etc.
>>  who stock it and it is fun to watch the # available go down one or two at a
>> time!  Hams at work.
>>
>> N0UU
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