I feel sorry for you guys that have to put up with those nasty old Redwood
trees! :-)
What kind of rotor is it? Some types are more susceptible to binding. Have
you tried momentarily reversing direction to free it? I put oil in a R-25
top section before for that, but determined it was a quirk of the Ham-#
rotor.
Chuck W5PR
----- Original Message -----
From: "Steve Jones" <n6sj@earthlink.net>
To: <jim@audiosystemsgroup.com>; <towertalk@contesting.com>
Sent: Sunday, November 13, 2011 2:07 PM
Subject: Re: [TowerTalk] Mast Binding in Rohn 25 Pointy-Top
> Jim-
>
> Here are a couple of pictures of how I installed my mast through a Rohn 25
> pointy top sleeve. The rubber pipe adapters for cast iron/plastic pipe
> are
> available at any Home Depot. I
> had to use a rat tail file to grind down the threads on the 1 1/2" side of
> the fitting, which is slightly less than 2" ID from the factory. I coated
> the upper part of the mast
> with white lithium grease before I slid it up through the pointy top
> sleeve,
> then
> slid the rubber adapter down from the top and secured it with the clamp so
> the lower part covered the opening of the tower sleeve. Never had a
> binding problem in the 10years it was on top of my 100' Doug fir, before
> the
> tree died.
>
> BTW if it binds only when it rains, it does sound like redwood debris that
> would swell up when wet. That duff gets into everything around here!
>
> 73,
> Steve
> N6SJ
>
> ----- Original Message -----
> From: "Jim Brown" <jim@audiosystemsgroup.com>
> To: <towertalk@contesting.com>
> Sent: Saturday, November 12, 2011 12:40 PM
> Subject: [TowerTalk] Mast Binding in Rohn 25 Pointy-Top
>
>
>> Crew,
>>
>> My Rohn 25 tower holds a 3-el SteppIR up about 125 ft in redwoods, about
>> 50 ft below the tops of the surrounding trees. For at least 6 months,
>> the mast has been binding when it's been raining much. I've carefully
>> studied things from the ground below, and there's nothing hitting the
>> antenna, so I believe it must be binding in the pointy-top. K6XX and I
>> have banged ideas around, and all we can come up with s debris from the
>> trees above collecting in the space between the mast and the sleeve, and
>> expanding as it gets wet.
>>
>> As a solution, we're thinking about hitting that gap from above with a
>> couple of cans of WD40, and perhaps adding some sort of rubber gasket on
>> the mast just above that point to prevent additional debris collecting
>> there.
>>
>> Does this make sense? Any experience from others on symptoms like
>> this? Any other suggested solutions?
>>
>> 73, Jim K9YC
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
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>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>
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