Sorry for the previous post, my email is not working well.
----- Original Message -----
From: "Gene Bigham" <jbigham2@kc.rr.com>
To: <towertalk@contesting.com>
Sent: Tuesday, July 12, 2005 6:44 PM
Subject: Re: [TowerTalk] Alliance HD73 Rotator calibrate and mast bolt size?
> I brought the rotator down and the only thing I could find that was a
> problem was dried up grease. So I lubed the whole affair up with white
> lithium grease on both bearing races and gears. Bench testing shows it
will
> now turn the whole 360 degrees. The control box works fine and indicates
> the direction fine. I have already purchased a new Yasue rotator that
will
> go up and I now have this Alliance HD73 surplus here to sell. What is it
> worth and does anyone want it?
>
> Let me know I am thinking about $75 plus shipping, what do you think?
>
> Let me know.
>
> Gene Bigham, KB0GU
>
>
> ----- Original Message -----
> From: "Gene Bigham" <jbigham2@kc.rr.com>
> To: <towertalk@contesting.com>
> Sent: Wednesday, June 22, 2005 6:04 PM
> Subject: [TowerTalk] Alliance HD73 Rotator calibrate and mast bolt size?
>
>
> > The recent round of 80 to 90 MPH straight line winds in our area has
> caused a misalignment of my rotator direction indicator and the actual
> antenna position.
> >
> > First, the indicator is centered on North and can go on the meter to the
> (left) South of West and on the (right) South of East.
> >
> > Right now playing with the calibrate knob and turning the antenna, the
> azimuth indicator needle will travel to and show South (of East) but the
> antenna and rotator stop at about the 130 to 140 degree position and
remain
> there, tracking of the sweep of the indicator needle seems linear from
North
> to the stop point. But the antenna will not advance past 130 or so to due
> South 180 degrees.
> >
> > On the other side of the indicator when I rotate back past North toward
> South (of West) the indicator arrives at South with a deceleration of the
> degrees traveled compared to the indicator as the antenna moves past north
> to north west then west, and finally ends up at south west say 210 to 220
> and stops shy of South.
> >
> > I initially tried to use the calibrate button to adjust this but the
above
> results are the best I can get.
> >
> > This is Alliance Model HD 73 and has been pretty bullet proof until now.
> >
> > The rotator initially torques on top of my Aluma tower top section in
> heavy wind storms until my antenna guy put a couple of self tapping large
> screws through the top plate and against the lower bell housing of the
> rotator to limit the rotation of the rotator on its mounting pipe. This
> rotator sits on top of the top plate using a lower pipe mount, the bottom
of
> the bell housing just sets on the top plate while the pipe goes down into
> the tower and is secured to the tower legs using U bolts to all three
tower
> legs.
> >
> > There are two options I am thinking about to correct the alignment.
> >
> > First, place the indicator and rotator as far to the South (of West)
> position and then loosening the mast clamp and manually align the antenna
to
> true south since the correspondence of degrees measured to degrees turned
is
> different on this side of the rotation.
> >
> > Or Second, place the indicator and rotator as far to the South (of East)
> position and align the antenna to true south loosening the mast clamp.
> >
> > Which way am I safe to presume will correct full range of rotation and
> more accurate correspondence to the measurement scale? I can get someone
to
> turn the antenna in the rotator to true South when the indicator is in
> either the South (of East) or (West) position.
> >
> > Anyone familiar enough with this rotator to assist?
> >
> > The antenna is A3S so precise pointing is not absolutely required,
rather
> ballpark pointing. At this point I cannot cover the last 30 to 60 degrees
> across the south stops.
> >
> > And if you know the bolt size on the bolt heads securing the mast pipe I
> can send my painter friend up his ladder against the tower, as climbing
this
> small tower is impossible, with the correct socket! So he can loosen then
> move and tighten the antenna into place.
> >
> > If I am incorrect in this entire diatribe please let me know your ideas.
> I plan to attempt this move tomorrow evening.
> > _______________________________________________
> >
> > See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
We
> ather 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.
>
> _______________________________________________
> 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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