[Top] [All Lists]

[TowerTalk] Re: The Ultimate One Tower System

To: <>
Subject: [TowerTalk] Re: The Ultimate One Tower System
From: (Dave D'Epagnier)
Date: Thu, 16 Dec 1999 09:05:12 -0700
Pete, I think you're (and they) are right. I was thinking the difference in
phase velocity between coax and air made the compensation unequal on the
different bands, but I think I now see the (speed of) light. I stand


        From:  Pete Smith []
        Sent:  Thursday, December 16, 1999 9:08 AM
        To:  Dave D'Epagnier
        Subject:  RE: [TowerTalk] Re: The Ultimate One Tower System

        At 08:49 AM 12/16/1999 -0700, you wrote:
        >The velocity factor in the coax is the same on all bands (of
course), but
        >the amount of phase shift between the two antennas will be
different on
        >different bands if unequal line lengths are used. The horizontal
        >between the two antennas can only be compensated for on one band
with this

        Dave, I think Guy and Jay are right -- because a 5-foot offset, for
        example, induces twice the phase shift on 10 that it does on 20.
        a 5 x VF length of coax would introduce the right amount of
compensation on
        each band.

        73,  Pete N4ZR

        Don't forget to update your entry in the contest station database

FAQ on WWW:     
Administrative requests:

<Prev in Thread] Current Thread [Next in Thread>