As most of us know, there's almost always at least a little breeze at 100
feet , however Steve's problem with a crankup is only with 20 feet.
Gene / W2LU
----- Original Message -----
From: "K8RI" <K8RI-on-TowerTalk@tm.net>
Sent: Monday, January 02, 2012 2:21 PM
Subject: Re: [TowerTalk] How to Level a Crank-up?
> On 1/2/2012 1:25 PM, Gene Fuller wrote:
>> On a calm day, you could hang a string, with a small weight on the end,
>> the top of each tower leg. Gene / W2LU
> It's easier to hand the string from the top of the tower, down the inside.
> OTOH I have never found a day calm enough to do this with a tower
> taller than 40 feet. I use the Transit level weight which comes to a
> Even an what felt like calm days the string would move off to one side
> and it was very difficult to detect. Around here those days are very
> rare. With the 100 foot 45 G even on those hot sultry (suffocating)
> calm summer days I find a light breeze at the top.
> I used one of the laser transits, although a laser level would be much
> cheaper. However some of then are barely good enough to square up a
> small room.
> Mine is a guyed tower (45G) and the bottom two sections were carefully
> leveled. Then the level was checked with each set of guys added. When I
> got to the top it was just a matter of tightening the guys a 40 or 30#
> at a time. So it went up straight.
> With a crank up you can only level it for a calm day. I think you will
> find it will be surprisingly straight, except on really windy days and
> those are when you want to crank it down anyway.
> Roger (K8RI)
>> ----- Original Message -----
>> From: "Steve Jones"<email@example.com>
>> Sent: Monday, January 02, 2012 12:42 PM
>> Subject: [TowerTalk] How to Level a Crank-up?
>>> I want to level my new US Tower HDX-589. I put a 4' carpenter's level
>>> all three legs of the base section and have levelled them. This is all
>>> Tower recommends.
>>> Is there anything more I can do? I have heard of using two theodolytes
>>> it fully extended. But I figure the sections must lean a bit due to the
>>> clearances that allow them to slide past each other. I don't want to
>>> the bottom section to compensate for that lean, since different antenna
>>> loads or wind loads will probably make it lean different directions.
>>> With the bottom section leveled, am I done?
>>> TowerTalk mailing list
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