Hey Gary
Well you seem to have narrowed it down pretty well. Just to be sure I would
first check back from the switch to your transceiver using a good dummy load
and
your analyzer. It's always easier to check everything on the ground first.
Since
you have done most everything else it sure won't hurt. I will take a shot and
say if everything out to the end of the Rat Pack is good then 1 the matchbox, 2
the feed-line, 3 the antenna. This is JMHO. I am sure there are others. One
other thing you can try is to add 3' or whatever you have available of coax to
the end of the feed-line and recheck with the analyzer. Whatever the result is
you seem to have it narrowed down. Eliminate everything on the ground before
going up the tower. Good luck, let us know how you make out.
73 DE K4XZ Joe Patrick
God Made Man
Sam Colt Made Them Equal
________________________________
From: Gary Stone <n5phtgs@gmail.com>
To: towertalk@contesting.com
Sent: Thu, February 16, 2012 10:54:37 AM
Subject: [TowerTalk] Beam problem
Greetings,
I have a Cushcraft ASL2010, 8 element Log up at 80 feet. All of a sudden
the SWR went up well over 5:1 on all 5 bands the antenna covers (20-10
meters).
I have an Array Solutions RatPak - 6 position antenna switch at the base of
the tower. I have a sloper for 80 meters and a G5RV.
I have completed several trouble shooting steps and still puzzled. The
most significant trouble shooting route was to use an SWR analyzer directly
at the base of the tower and in the shack. At the base of the tower
everything is eliminated except the coax to the beam and the beam itself
(including of course the little Cushcraft match box at the beam).
And here is the interesting thing: The SWR Analyzer can be set to show SWR
and IMPEDANCE. On all 5 bands the IMPEDANCE is around 50 ohms (which would
be correct) HOWEVER, the SWR remains very high.
Any help greatly appreciated.
Gary Stone, N5PHT
****** Gary Stone, N5PHT ******
**** 347 CR 1250 ****
**** Savoy, Texas 75479 ****
UNITED STATES OF AMERICA
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