Hi Cris
There is an additional benefit with Fibreglass tube. Just use the wood inserts on the clamping areas, rotator and antenna clamps. Then the tube will flex in high winds and absorb some wind enegy.
73 John G7HIA
________________________________ From: Howard Long [email protected] To: Chris Bloy [email protected] Cc: Amsat - BBs [email protected] Sent: Tuesday, 23 August, 2011 8:24:38 Subject: [amsat-bb] Re: Fibreglass tube for G5500?
Chris
Haydon Communications stock (or at least did stock) various diameters/lengths.
Howard
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On 23 Aug 2011, at 08:03, Chris Bloy [email protected] wrote:
Hi all,
Thank you all very much for your input and as expected the aluminium pole isn't an option, so I am going down the route of fibreglass tube with wood insert.
Just need to source a UK company that can supply the tubing! I have contacted Engineering Composites and will await a price!
All the best!
Chris - M0DQO FUNcube Educational Outreach :)
www.funcube.org.uk
www.projectoscar.co.uk
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On 22 Aug 2011, at 16:28, "Alan P. Biddle" [email protected] wrote:
Chris,
As has been pointed out, an aluminum liner won't work. I have a fiberglass tube, and found a solid wood rod at a local building supply store. It is a perfect friction fit. I cut it about 2 inches shorter than the tube, leaving about an inch space at each end. I stood it on end, and filled one end with RTV. After it hardened, I swapped ends and sealed the other end. It has been in use for almost 15 years with no failures or leakages.
73s,
Alan WA4SCA
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_______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb