[TowerTalk] Antenna Distance From Shack
Robert Chudek - KØRC
k0rc at citlink.net
Fri Aug 18 13:23:06 EDT 2006
Can you elaborate on the "1750 Hz (measured at 28 MHz) of 3/4" CATV" you mentioned? First, I assume you meant 1750 KHz, but aside from that, I'm not following what you mean.
Also, measuring loss at the shack with the MFJ-259B... Unless you install a non-resonant 50 ohm terminator at the opposite end, your readings in the shack will continue to 'vary widely' (although maybe not as "widely"). If you installed a 50 ohm load on one port of a remote antenna switch that would accomplish the task, but I'm thinking this is not what you had in mind regarding measuring loss.
73 de Bob - KØRC in MN
Date: Fri, 18 Aug 2006 08:13:14 -0400
From: Pete Smith <n4zr at contesting.com>
Subject: Re: [TowerTalk] Antenna Distance From Shack
To: TOWERTALK at contesting.com
Message-ID: <18.104.22.168.2.20060818080204.05175928 at mail.adelphia.net>
Content-Type: text/plain; charset="us-ascii"
Frank and Bill make good points. For the last 10 years, I have been using 3/4" CATV for most of the 190-foot run from my house to my antennas. To be specific, I use RG-213 up the tower and across the roof of my house to my 2nd-floor shack, but use multiples of a half-wave at 1750 Hz (measured at 28 MHz) of 3/4" CATV in between.
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I want to be able to monitor loss from the shack, something that my composite feedline doesn't seem to let me do (the indicated loss on my MFJ-259B varies widely with frequency).
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