You may get this to work if you are the only source of RF in the vicinity, however if you have other cabinets of equipment creating anything that contains RF, you will be in need of shielding - double shielding that is. Regarding aluminum feedline construction, if you take all the precautions to keep the temperature, humidity and mechanical alignment constant it has been proven to work but in most cases the added expense of lifting/support fingers and all the brackets needed to use the product surpass the cost of using something designed for the project. In theory you can pull a 25 foot travel trailer with a 45 horsepower Volkswagen beetle, however adding the extra gearbox - springs - generator for lighting equipment - tires - brakes - mirrors and anything else I may have forgotten make it less costly to use a vehicle more suited to the job from the beginning.
Dan Hancock wrote: > > Why do you believe that double shielded cable is > necessary for an antenna run? What are you trying to > keep the signal out of? > Inter-cabling within the cabinet needs to be double > shielded to prevent interaction between the TX and RX > portions, but once those signals are merged at the > output of the duplexer they are both on the same > feedline anyway and double shielding is expensive and > unnecessary. > For short antenns runs, RG213 is actually an excellent > choice. > The only exception to this is if there is no duplexer > being used and the repeater is operating on split > antennas with parallel feedline runs, then 100% > shielding is necessary. Under these circumstances > LDM400 or 9913 would be a good choice if heliax is not > available affordably since the cables are not being > used in a duplex setting. > > Dan N8DJP > > Date: Tue, 11 Nov 2003 15:38:12 -0500 > From: Jim <[EMAIL PROTECTED]> > Subject: Re: Static / desense problems > > Gene Colson wrote: > > > And I am going to once again proclaim that with > proper > connectors, LMR 400 > > is as good as it gets.No more noisy that RG213. I am > > using it on 900 , 440 > > and VHF duplexers and assure you , there are no > problems, > > Gene W7UVH > > > > Of course not-RG213 is unsuitable for duplex as well, > as it > is NOT > double shielded!!! Or do you mean RG-214, which IS > double-shielded? > And Andrews LDFwhatever-50 is as good as it gets for > feedline for ANY > application!!!!! (well, maybe a few exceptions, like > if you > need > radiating feedline, or plenum-rated...) > > -- > Jim > > __________________________________ > Do you Yahoo!? > Protect your identity with Yahoo! Mail AddressGuard > http://antispam.yahoo.com/whatsnewfree > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ -- 73...Clark Beckman N8PZD Pursuant to U.S. Code, title 47, Chapter 5, Subchapter II, �227, "Any and all nonsolicited commercial E-mail sent to this address is subject to a download and archival fee of $500.00 U.S.". E-mailing denotes acceptance of these terms. Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
