[TowerTalk] Dissimilar boom sizes - how to put them together?
Stan or Patricia Griffiths
w7ni@teleport.com
Sun, 01 Oct 2000 13:01:26 -0700
Hi Bob,
I would prefer to use larger tubing for booms that long so I would be inclined
to cut the 24 foot piece into two 12 footers and put a 10 or a 12 foot larger
piece in the center. Anyway, for two pieces of fairly large tubing that have a
sloppy fit, I would find some thin sheet to make a shim out of. You can cut
the sheet to the right size of rectangle and have it rolled into a tube at a
machine shop. There is no need to weld the seam. If one shim is not enough,
use two.
Stan
w7ni@teleport.com
Robert Shohet wrote:
> Dear TT'ers,
>
> I have a 24' piece of 2" OD, 1 3/4" ID aluminum boom about .125" wall. I
> need to extend it to about 32' for a 20 meter beam.
>
> The 1 3/4" tubing that I have will not fit inside the 2" boom, and some 1
> 5/8" tubing that fits quite loosely. Ideally I could use 1 11/16" tubing
> but no one (including Texas Towers) seems to have any. I would prefer a
> "tight fit" but will use the 1 5/8" if there are no other options.
>
> I would like to have about 3' of the tubing inside the 24' boom and have
> about 4' extending out of the 24' boom on each end and then would bolt or
> screw the two pieces together and then use silicone seal to fill in the
> "gaps" where the two pieces join.
>
> I have a feeling that here is a better way to join these pieces together in
> a more secure and mechanically sound fashion, or maybe someone has a source
> of 1 11/16" OD aluminum tubing?
>
> Your thoughts and suggestions please?
>
> Tnx & 73
>
> Bob KQ2M
>
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