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 <[email protected]>: > 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 > _______________________________________________ > Sent via [email protected]. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > -- Jean-François Ménard VA2SS =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= AMSAT www.amsat.org / Member #37102 ARRL www.arrl.org =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
