[TowerTalk] Tower in the attic!

[Guy Olinger, K2AV]

> > The biggest thing that the tower accomplishes is a rigid,
non-wobbling
> > pipe that on the outside as the mast/bearing pipe goes through the
> > roof. This is really necessary for the weather seal to work and stay
> > working.
>
> But, couldn't you simply use 2 dissimilar diameters of pipe, one
> being the mast
> which rotates inside the other.

I think you would have to do something to fasten the outer pipe to
something sturdy and immovable just above the rotator. This keeps the
normal slop in the rotator top half from being transmitted as movement
in the pipe at the weather seal which sooner or later will then start to
leak.

You will have created the partial equivalent of the tower to get the
rigidity.

With the top tube of the tower securely braced to the roof joists, the
QST arrangement seems far more solid than any of the alternatives yet
suggested in this thread.

A modification that I might make to it, would be to take the tower tube
through the roof right next to and pressing on a roof joist, which would
allow U-bolting the tube to the roof joist -- really solid, especially
if that joist is then cross-trussed to the ones on either side.

What I don't know is whether the length of the tube above the triangular
structure will allow this with enough left above the roof to accomplish
all the weatherproofing tricks.

I agree it probably creaks in the wind, great on Halloween, etc... The
clunks can gotten rid of by forcing highly greased strips of  thin shim
metal down between the mast and the tube.
.
>
> 73
> Ed
- - . . .   . . . - -     .   . . .     - - .   . - . .

73, Guy
k2av@contesting.com
Apex, NC, USA




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