Re: Fibreglass tube for G5500?
----- Original Message ----- From: "Chris Bloy" chris@photofuture.co.uk To: amsat-bb@amsat.org Sent: Monday, August 22, 2011 11:01 AM Subject: [amsat-bb] Fibreglass tube for G5500?
Hi All,
So, I was wondering, can I get say a 1 ½ fibreglass pole and then slip the slightly small aluminium pole inside to give extra strength without affecting the radiation pattern?
Hi Chris,M0DQO
You cannot because a fibreglass tubing fitted over an aluminium tubing is like to have a single aluminium tubing and the radiation pattern will be affected.
I have google'd a couple of places and it appears I need to get tubing but not sure if anyone has any experience in this department?
Read please the following article written by G6LVB
http://www.g6lvb.com/fibermetalboom.htm
Many Thanks,
Chris - M0DQO
73" de
i8CVS Domenico
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
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
Sent from my iPhone
On 22 Aug 2011, at 16:28, "Alan P. Biddle" APBIDDLE@UNITED.NET 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
Chris
Haydon Communications stock (or at least did stock) various diameters/lengths.
Howard
Sent from my iPhone
On 23 Aug 2011, at 08:03, Chris Bloy chris@photofuture.co.uk 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
Sent from my iPhone
On 22 Aug 2011, at 16:28, "Alan P. Biddle" APBIDDLE@UNITED.NET 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
Sent via AMSAT-BB@amsat.org. 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
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 howard@howardlong.com To: Chris Bloy chris@photofuture.co.uk Cc: Amsat - BBs amsat-bb@AMSAT.Org 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
Sent from my iPhone
On 23 Aug 2011, at 08:03, Chris Bloy chris@photofuture.co.uk 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
Sent from my iPhone
On 22 Aug 2011, at 16:28, "Alan P. Biddle" APBIDDLE@UNITED.NET 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
Sent via AMSAT-BB@amsat.org. 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
_______________________________________________ Sent via AMSAT-BB@amsat.org. 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
participants (5)
-
Alan P. Biddle -
Chris Bloy -
Howard Long -
i8cvs -
John Heath