It is amazing how well the two element per band interlaced yagis can work.
There is no change in radiation angle if you mounted it in the same location
as the TH7. I too have had element tips break off Hy-Gain antennas.
73,
John KK9A
To: Kelly Taylor <ve4xt@mymts.net>, Bry Carling <bcarling@cfl.rr.com>,
"jim@audiosystemsgroup.com" <jim@audiosystemsgroup.com>
Subject: Re: [TowerTalk] antenna choices
From: Benedikt Sveinsson <benedikt@ok.is>
Date: Sun, 12 Apr 2015 13:05:41 +0000
I have some comparison
I had a new model of the TH7DX on a 43ft tower for 4 years - bougth the
antenna
new from Dxengineering
In Feb I got a Optibeam OB9-5
I really hated putting the TH7DX togeather - and then picking it up after
each
storm, the build quality was bad, tapering was not done properly so the
clamps
did not hold the elements properly, so I had to put a screw into every
joint.
Trap caps would not stay on, QRO op in rain was troublesome (live close to
the
sea). The Optibeam was just properly designed and withstood one of the worst
storms we had here in decades (gusting over 45m/s) it was so easy to put to
gether and no room for error. Just read the rewies on eham.
On the air, the OB9-5 performs so much better than the TH7DX - that is my
feeling albeit bit subjective - It seems to have much lower angle of
radiation. I was sceptical as the OB9-5 only has 2 elements on each band,
wheras the TH7DX has 3 or more. But on all bands the OB has outperformed the
old design by far. It's very flat over each band in SWR. So I'm never going
back to trapped yagis. I now have the feeling If I can hear the station, I
can
work it - and I always get the DX in few calls ;)
73, Benni TF3CY
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