[amsat-bb] Re: Preamp location tech question

[Jean-François Ménard]

Hi, it is more efficient to keep preamps to the nearest place of
antenna..... at this moment you are also amplify noise that is pick up
by your coax. I tested the difference before changing my feed line
with heliax ldf4, and you can hear a difference on low elevevation
pass. I really think it worth it, even if you have only 50 feet run. I
have alsmost the same lenght of feed line at my place.

73

J-F VA2SS

2009/12/18 Elan Portnoy <elanportnoy at yahoo.com>:
> Hello all,
>
> In the midst of all the excitement around the new birds, I have a question for all of you:
>
> I have ARR preamps on both the 432 and 145 transmission lines. At the moment, they are located in shack, just before the transceiver.
>
> Both lines to antennas are 50 feet (15.24 meters) of LMR400. How much of a performance improvement should I expect from mast mounting the preamps? It could be done, but I'd rather keep them inside if there's nothing to be gained.
>
> Thanks,
> Elan - WB2IOL
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-- 
Jean-François Ménard
VA2SS

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