Steve,
Using good ol' logic, try a different transmitter, then perhaps fix the
FT990?
Rex, K1HI
Rex Lint, Consultant
26 Brek Dr.
Merrimack, NH 03054
PH: 603-860-7651 FAX: 603-882-6612
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of K7LXC@aol.com
Sent: Thursday, October 06, 2005 11:46 AM
To: towertalk@contesting.com
Cc: W7FPChuck@aol.com
Subject: [TowerTalk] Antenna problem?
Howdy, TowerTalkians --
I've got an antenna problem and I'm stumped. An M2 15M monobander
developed some high swr - 3:1 or more where it used to be 1.1:1.
I took a crane and man-basket up to the feedpoint and measured the swr
with my MFJ at the balun; it was 1.2:1. I next measured at the jumper to the
tower - same thing. Then I measured the end of the feedline in the shack -
same
thing. As far as I was concerned, the antenna system was fine.
Plug it into the FT-990 and the swr on the rig was 3:1. Antenna tuner
was
off. Add different lengths of RG-8, the swr varied from 2.5:1 to 5:1. It
doesn't seem to be wx related.
Like I said, I'm stumped. Any help out there? Solutions appreciated!
Cheers,
Steve K7LXC
TOWER TECH
_______________________________________________
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.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
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.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|