John-
Why not cut off part of your mast to lower the antenna and reduce the load
when raising and lowering? The 5' less mast would also reduce the raising
weight, whereas an additional shelf 5' lower would increase it.
73,
Steve
N6SJ
----- Original Message -----
From: "Richard (Rick) Karlquist" <richard@karlquist.com>
To: "John Hudson" <jd_hudson@comcast.net>
Cc: <towertalk@contesting.com>
Sent: Wednesday, January 18, 2012 9:01 PM
Subject: Re: [TowerTalk] 2nd Rotor Shelf TX-455
> Consider this: when the tower is all the way up, the section
> overlap is only 4 feet. Thus your rotor that "overlaps" 5
> feet should not be any worse than just adding another section.
> As far as the mast is concerned, we all know that the 5 feet inside the
> tower isn't going to be where it bends. The only argument you have is
> that the side force on the rotor will be reduced. I think this
> is why UST makes no provision for doing this.
>
> If there is a flaw in my reasoning, someone chime in...
>
> Rick N6RK
>
> On 1/18/2012 1:20 PM, John Hudson wrote:
>> I just purchased a new TX-455 in August 2011 and it's installed with a 4L
>> 30/40m Steppir with a Tilt Plate and a 22' chrome molly 2" mast. The
>> rotor
>> shelf is apprx 5' into the tower and I have 17' sticking out. Now this
>> adds
>> a pretty good load on the tower when raising and lowering. I want to drop
>> the rotor about 5 more feet into the tower but US Tower offers no
>> accessory
>> shelf. The TX-455 bracings are slanted and not horizontal like Rohn tower
>>
>>
>>
>> Has anyone added a 2 shelf other than wielding something place?
>>
>> Thanks
>>
>>
>>
>> 73
>>
>> John
>>
>> KO4XJ
>>
>> _______________________________________________
>>
>>
>>
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>>
>>
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