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[TowerTalk] Joining masts/torquetube drive

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Subject: [TowerTalk] Joining masts/torquetube drive
From: (Thomas Cook)
Date: Sun, 18 Jul 1999 12:48:05 -0400

I posted this on another reflector with a few interesting responses;
thought I'd re-aim it directly at the tower gurus.

I need to axially connect two pieces of 2"OD x 1/4" wall 6061-T6 (I know
- chrome-moly is stronger) for a torque-tube drive.  Seems my T-twister
won't fit inside a 14" (face) tower section and I have to get it down to
the 18".  There will be ~34' inside the tower; there will be a lateral
thrust bearing ~10-15' down inside the tower.  I have considered using
an internal tube for axial alignment and a flat plate with muffler
clamps (four min.) to transfer the torque.

The antenna stack is a 2 wavelength 6m. beam + two 24 el. K1FO style 432
beams - the top of the stack is ~10' above the top of the tower (50'
tower) - not too bad.

QTH is in the Southern tier of NY on top of a decent hill.

Yes, I am **working** my way thru the archives (a formidible task - keep
getting sidetracked with other interesting stuff)!!

Ideas, suggestions, comments - please.


Tom - WA2BPE

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