[amsat-bb] Re: Help - Alliance U-110 as an elevation rotator

Greg D. ko6th_greg@hotmail.com
Mon Sep 4 10:20:46 PDT 2006

Hi Emily,

I've used the Alliance rotor sideways for years, and have had no trouble 
with it.  I have mine mounted with the 4 mounting legs going sideways into 
the shaft of the Az rotor, and the lump facing down.  I've used it to swing 
the antennas the full 180 degrees for flipped operation in the past, though 
now that I'm running Linux / Predict I only use 0-90 (gotta fix that one of 
these days...).  Haven't tried it in a different position; it just seemed to 
want to mount this way.  Was I lucky?

Pictures at:  http://home.jps.net/~gregd/hamsite.htm

Good luck,

Greg  KO6TH

----Original Message Follows----
From: Emily Clarke <emily@planetemily.com>
To: amsat-bb@amsat.org
Subject: [amsat-bb]  Help - Alliance U-110 as an elevation rotator
Date: Mon, 04 Sep 2006 08:57:57 -0700

I'm mounting an old Alliance U-110 rotator horizontally to use as an
elevation rotator, and I have noticed that if it is sitting with the
mast clamp on the top everything works very well.  If it's flipped
with the mast clamps on the bottom (so it can connect to the azimuth
mast) it seem stall and jam.

I'm not sure if this is normal or just a sign of age but I traced the
problem to a small gear under the shaft that "drops" when the rotator
is in the clamp-bottom position and then slips over the top of the
gear it is supposed to drive.

Since many people have used this rotator for elevation in the past,
has anyone run into this problem before?  If so, did you find a
solution for it?



N1DID formerly W0EEC - CM87tm

Support Project OSCAR - http://www.projectoscar.net

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