[amsat-bb] Preamp location tech question

Elan Portnoy elanportnoy at yahoo.com
Fri Dec 18 09:52:24 PST 2009

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.

Elan - WB2IOL

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