[TowerTalk] installing monster masts in towers
ve6jy at 3web.com
Wed Jun 8 12:36:19 EDT 2005
Many rotator motors are now DC.
And the current method is fine as long as you have not yet installed the
antenna (or no wind if you have).
I take a small 12v 2 amp/hr gel cell up the tower, plenty of capacity to
turn the rotor and antenna thru several complete rotations and check for
mast/bearing alignment and coax loop issues.
----- Original Message -----
From: <G3rzp at aol.com>
To: <towertalk at contesting.com>
Sent: Wednesday, June 08, 2005 16:24
Subject: Re: [TowerTalk] installing monster masts in towers
> slightly O/T, G1YGY suggested to me a very delicate method of checking
> the rotator and the thrust bearing(s) line up that I haven't seen
> Measure the current drawn by the rotator as it goes round: it should be
> substantially constant. If it goes up at one place, suspect misalignment.
I had a
> slight bend in the stub mast as a result of the bearing having worn over
> years: it wasn't apparent on an in situ visual examination, but there was
> some binding. The current measurement method showed up when the correct
> alignment had been achieved. I ended up with a variation of less than 1%
on a T2X.
> Of course, you do need an AC ammeter......
> Peter G3RZP.
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
> TowerTalk mailing list
> TowerTalk at contesting.com
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