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Re: [TowerTalk] Rotor faialure

To: David Robbins K1TTT <k1ttt@arrl.net>
Subject: Re: [TowerTalk] Rotor faialure
From: Mike Reublin NF4L <nf4l@comcast.net>
Date: Tue, 21 Jul 2015 15:26:59 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Thanks, David -

I'm leaning toward a gut shot. Everything on the exterior looks good. I have a 
new-in-the-box twin, jut pondering whether to use that or got for the 2800. The 
1000 was up for maybe 10-12 years before it failed.

73, Mike NF4L


> On Jul 21, 2015, at 2:49 PM, David Robbins <k1ttt@verizon.net> wrote:
> 
> no continuity on any of the wires... possible causes: broken cable, broken 
> connector, guts of rotor wiped out including pot and motor.
> 
> antenna freewheeling... possible causes: guts of rotor wiped out, broken 
> mounting bolts
> 
> broken mounting bolts+freewheeling = broken cable or connector when it tries 
> to stop the freewheeling... can you see if the bottom of the rotor housing 
> itself is 
> turning with the antenna?  if that is turning the mounting bolts are gone but 
> maybe the rotor itself is ok, if the base is still attached to the mounting 
> plate and 
> the top is turning its probably time for a new rotor.
> 
> 
> Jul 21, 2015 10:26:43 AM, nf4l@comcast.net wrote:
> 
> The other day, I turned on my G-1000DXA and got no response. The box says 180 
> degrees, and the antenna is pointed north. 
> 
> I read open on the wiper and pot wires, and on the motor pair. Applying 12v 
> to the motor wires did nothing.
> 
> I finally noticed the antennae were freewheeling in the wind. I lowered the 
> tower and see no external signs of failure. Any speculation on what has 
> failed and why? I'm wondering if the mast is centered. When the tower is 
> horizontal, how does one tell?
> 
> The antennas are a 4L Steppir w/30/40 and a 7L 6M beam. The vertical load is 
> taken by a bearing. The "pin" bolt appears to be intact.
> 
> 73, Mike NF4L
> 
> 
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