I would not use such a small rotating pipe with an antenna that size,
not even with a short mast.
With that length I would use at least 4 inch or more.
I use a KLM logperiodic with a 36´boom on a 2" mast at 4m
length between rotator and antenna and that twists already
a lot in high winds.
73
Peter
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of WA3GIN in Alex. City,
VA
Sent: Donnerstag, 19. Januar 2006 03:17
To: stan@aqity.org; towertalk@contesting.com
Subject: Re: [TowerTalk] Rotator at bottom of tower
I've successfully done the same thing with a 50ft tower. It's a lot of
work to install. There will be a lot of weight on that bearing just
above the rotor. Might be easily to just hire someone to swap out the
rotor when it fails. Just depends on how much time you want to put into
the project. For a hundred foot you might want to start out with a
larger diameter for the first 50ft and consider installing a brake at
the top to limit the twist on that 100ft of pipe when it gets windy.
Then again some will say the twist will save your antennas, so at least
with the brake as an option you can decide for yourself.
Have Fun.
73,
dave
wa3gin
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Stan Stockton
Sent: Wednesday, January 18, 2006 7:55 PM
To: towertalk@contesting.com
Subject: [TowerTalk] Rotator at bottom of tower
I am "considering" the possibility of running 105 feet of pipe extending
the existing mast to near ground level and mounting the rotator at that
location. The antenna is 20M5L48. I have to take the rotator down
because of a maintenance issue anyway and thought that in the long run
it might be nice to have the rotator low to the ground.
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