|To:||"Tom Martin" <email@example.com>, <firstname.lastname@example.org>|
|Subject:||Re: [TowerTalk] Replacing coax question|
|From:||Joe - WDØM <WD0M@centurytel.net>|
|Date:||Mon, 11 Oct 2004 12:41:22 -0600|
Should be VERY negligible. I'd ground the coax barrels at the top and
bottom of the tower to provide lightning protection too, while I was at it.|
73, Joe WDØM
At 12:36 PM 10/11/2004, Tom Martin wrote:
I am replacing a 90' length of RG8 water damaged coax to my 40 meter beam. I have LMR 400 for the main run up the tower but want to use a RG8 section for the rotator loop. There are two ways to do this. First, a 14' section of RG8 from the feed point of the beam with one PL259 and one barrel connector to join the LMR. Secondly, a 10' section of LMR and PL259 to a barrel connector and a 4' section of RG8 for the loop to join the LMR that goes down 80' to the antenna relay box at the base of the tower. This configuration would require 4 PL259's and two barrel connectors. I want to avoid the many possible problem areas with the multiple connections. I think that I have answered my own question but wasn't sure if adding that much RG8 to the run would offset the benefit of the LMR 400. I suppose on 40 meters the loss would be negligible. Am I correct?
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
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