[TowerTalk] Short (5') mast OK?
K6LL at adelphia.net
Wed Feb 21 13:30:47 EST 2007
Texas Towers will saw off one foot from their 10' masts for
you. The 9 footer is UPS-shippable.
Dave Hachadorian, K6LL
----- Original Message -----
From: "jknodel M Knodel" <jknodel at msn.com>
To: <towertalk at contesting.com>
Sent: Wednesday, February 21, 2007 5:50 PM
Subject: [TowerTalk] Short (5') mast OK?
> Greetings TT,
> I am planning (finally) my R25 installation this spring.
> I am currently
> shopping around for masts and found that I have a few
> options. The first is
> to get a 10' mast from Home Depot. This is the same mast
> that is used for
> new overhead electrical services. I would like to go with
> a ten footer but
> dont have any information on the material used for these
> masts. My other
> option is to order a high-carbon steel mast. Again, I
> would like to go with
> a ten footer but the shipping price is ridiculous. It
> would cost $400 plus
> just to ship the darn thing. I can get a high-carbon
> steel 5' mast that
> will ship by UPS. Shipping by UPS is only a few dollars
> for a 5' mast.
> So, my question is this: Is a 5' mast adequate for my
> installation of a 3
> element SteppIR with passive 6m element at 60'? This will
> be the only
> antenna I have installed on the mast. I have read that a
> longer mast (10'
> or more) will reduce the torque and twisting moment on the
> rotor. Is there
> really much of a difference between 5' or 10' in this
> regard? By the way, I
> will be using a BPL25G top plate on the tower with a
> thrust bearing to
> reduce the load on the rotor.
> Thanks for any help you can give. I appreciate it.
> Jon, N7XW
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> TowerTalk at contesting.com
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