[TowerTalk] FW: Determining coax length?
km5vi at flukey.cc
Tue Nov 12 23:24:07 EST 2013
Thanks John for teaching me something new! I modeled 2-stack array this
evening and you are correct - the performance & pattern are predicted to
tolerate quite a bit of phase shift before things start becoming
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
john at kk9a.com
Sent: Tuesday, November 12, 2013 8:05 AM
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Determining coax length?
Can't you measure it on the tower? The length is not that critical, even
20 degrees out of phase shows little change in the pattern.
To: "towertalk at contesting.com" <towertalk at contesting.com>
Subject: [TowerTalk] Determining coax length?
From: Rich Hallman - N7TR <rich at n7tr.com>
Date: Tue, 12 Nov 2013 13:49:17 +0000
I am stacking several mono banders with a stackmatch II. I have the
mounted on the towers, but the coax feedlines are different lengths right
The Stackmatch wants coax lengths to both antennas to be the same length,
but I'm unable to physically measure to the end of the feedpoints on the
coax is the same (RF Davis Buryflex)
1) How critical are the coax lengths to the stackmatch from each
2) What tools can I use to determine the length of coax to each
(AIM 4170, MFJ, etc?) and how do you determine equal lengths?
ex KI3V, N3AMK, WB3JOV
Telnet: dxc.n7tr.com N7TR DXCluster
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