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Re: Pre-amp for IC-910h?



Hi Martin

I use two SSB electronics pre-amps, powered permanently through the coax.  I
initially used an external power unit through the coax as I was worried
about the power spec, but the loss through the extra connectors and jumpers
seemed silly to waste and turns out, after stopping by Icom, they aer just
down the road, the techs told me that the radio had more than enough ability
to sink the current needed for the SSB and Icom pre-amps and I think the SSB
actually draws a little less.  The SSB units are awesome...  I have two.
You may have to turn down the gain on the 2 meter amp, but the 440 works
perfectly out of the box and the noise floor is outstanding

Michael

-----Original Message-----
From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On
Behalf Of Jim Sanford
Sent: Tuesday, March 27, 2007 5:44 PM
To: Andrew Glasbrenner
Cc: amsat-bb@amsat.org
Subject: [amsat-bb] Re: Pre-amp for IC-910h?

All:
I neglected to mention in my earlier response that I have successfully 
powered the SP2000 and SP7000 from the IC910H, using the preamp function 
in the radio.  While I'd never use power up the coax for a final 
installation, it sure is nice for Field Day.   My experience is similar 
to Drew's, the SSBs are much lower NF and much higher intermod rejection 
(probably due to the helical filter in part).

Good luck & 73,
Jim
wb4gcs@amsat.org


Andrew Glasbrenner wrote:

>The Icom units are easy to install and use with the 910, but leave a LOT to
be desired in terms of noise figure. It speaks volumes that they do not
publish NF specs that I know of...
>
>I'm in the process of replacing mine with older Landwehr units.
>
>73, Drew KO4MA
>
>-----Original Message-----
>  
>
>>From: Martin Grundy <m0ady@m0ady.org.uk>
>>Sent: Mar 27, 2007 11:31 AM
>>To: amsat-bb@amsat.org
>>Subject: [amsat-bb]  Pre-amp for IC-910h?
>>
>>Hi...
>>
>>I am thinking of buying a masthead pre-amp for use with the Icom IC-910H
>>for both satellite and terrestrial work.
>>
>>There are the AG-25/35 units from Icom which are specially designed
>>for use with the 910. But I have seen the SSB Electronics units on the
>>web (SSB-SP-2000/7000) and also the Microset units (PR-145A/430A) and
>>wonder if these devices perform better than the Icom units.  Also, would
>>the SSB/Microset units require a sequencer.
>>
>>I would be interested to hear from anyone who has been down this road
>>with an IC-910H.
>>
>>Thanks in advance, 73 Martin M0ADY.
>>
>>-- 
>>Martin Grundy  (M0ADY)  <m0ady@m0ady.org.uk>
>>AMSAT-UK: 6314
>>_______________________________________________
>>Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author.
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>>
>
>
>
>_______________________________________________
>Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author.
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>  
>
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