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Re: [TowerTalk] Mast -- Drill or not?

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Subject: Re: [TowerTalk] Mast -- Drill or not?
From: "Michael" <>
Date: Fri, 25 Aug 2006 09:01:21 -0700
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Try the above link to work out your Declination, there is a link on the
site to a calculator.  I doubt you would be as much as 30 degrees off
true north, I am 18 degrees here by SFO.

I would not pin the rotator, better to let it move and re-adjust, I
scribe a mark on the mast and rotator, so I know if the mast has moved
and where to move it back if it does.

Much less costly than change out a rotator.

Mike K6BR

I am just about to start installing my 9 foot roof tower with an 1/4
inch wall alumunin mast (9 foot) with a 3 element 
SteppIR mounted about 4 1/2 to 5 feet above the tower.

Is the center bolt on the Ham-IV rotator sufficient to keep the mast
from turning or should the mast be drilled so that 
the bolt (or an pointy end bolt) has a more positive hold on the mast?
Winds of 50-60 mph are occassional in the 

Thanks to this reflector for pointing me to the Penninger website for
the mast.  I had the mast in less than a week.

My only remaining problem is finding true north...My house is
approximately 30 degrees off of magnetic north.

    -- Bruce

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