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.
73 Don
VE6JY
----- Original Message -----
From: <G3rzp@aol.com>
To: <towertalk@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
that
> the rotator and the thrust bearing(s) line up that I haven't seen
elsewhere.
> 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
they
> 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......
>
> 73
>
> 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@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
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.
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TowerTalk mailing list
TowerTalk@contesting.com
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