> Gents:
>
> I saw an elegant solution to how to get a 20-24 foot piece of chrome moly
> inside a tower. I do it a different way, and have had no problems up to this
> point in my strategy. I mention it as a point of comparison.
>
> I always set the rotal at the bottom of the top section so about 8
> feet of the mast is inside the tower with about 12 feet out the
> top.
> The way I get the long mast above the tower and down into the
> thrust bearing is that I use the standard size ginpole to raise a
> very long ginpole made out of 1.5 or 2" black pipe used only for
> this operation.
(editted lots out, no point in repeating the whole message)
> The long ginpole simply has an appropriately large and heavy duty
> pully inserted in the top.
> Using this top raising position, I have had no problem lifting the main most
> up over the top of the tower.
(more editting)
> Gary W5FI Ex-W5VSZ
>
>
> Now, the professional engineers may have problems with my strategy,
Well, Gary, I am not an engineer; just a semi-professional amateur
tower erector, but your method sounds good to me. I also like to set
my rotator at the bottom of the top section in some installations; it
reduces the leverage of the mast for producing lateral moments on the
rotator case. The price is in the "wasted" mast between the rotator
and thrust bearing; i.e. wasted in the sense that no antennas can be
mounted there.
And you are also right; the other method you mentioned was elegant.
It has its applications, but yours is just as good.
73, Rod N4SI
The DXer formerly known as N9AKE
(c) 5 November, 1996
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