The TH11DX doesn't use traps on 12m or 20m, the driven elements are all part of
the log periodic part of the beam, with elements connected by wire straps to
the two phasing tubes.
So, I doubt it's a trap failure. Sounds more like connections broke or worked
loose on the 20m element and the 12m element.
How are all the "other" bands, like 15m, 17m, 10m? Might help reveal if the
problem is with one of the phasing tubes or its primary connection, or just
with those two elements.
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
as1935@012.net.il
Sent: Monday, June 30, 2014 2:39 PM
To: towertalk@contesting.com
Subject: [TowerTalk] Help with Hygain TH11DX
Sirs,
I have a TH11DX which has been working well for over 12 years with very good
results.
Yesterday I lost 20m and 12 meters with very high swr....... almost infinity
On other bands I have 1.3:1 vswr with good performance.
I think it happened while tuning my amplifier using about 400w.
Wonder if their is a fix for the problem,its a real problem taking the antenna
down ,my tower is Rohn 25g sections at 45ft.
Thanks in advance.
Aron Slonim 4x1fq.
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