Will sch 40 pvc be ok for a 440 mhz boom? Or will it eventially warp in
the sun? (We have brutal summers sometimes).

Will sch 40 pvc be ok for a 440 mhz boom? Or will it eventially warp in
the sun? (We have brutal summers sometimes).



Its OK


Ed

On Tue, 18 Jan 2005 22:31:27 GMT, Ed wrote:

Will sch 40 pvc be ok for a 440 mhz boom? Or will it eventially warp
in the sun? (We have brutal summers sometimes).

Its OK

For selected definitions of "OK".
The UV radiation will eventually turn it to dust. Here at 7,700',
that occurs in about 3 years. Painting it may delay that problem.

73
Jonesy
--
| Marvin L Jones | jonz | W3DHJ | linux
| Gunnison, Colorado | @ | Jonesy | OS/2 __
| 7,703' -- 2,345m | config.com | DM68mn SK

Have had CPVC break down and "go away" but never PVC.

Sam

the typical White colored PVC will break down in the sun unless you
paint it with a UV shield paint
and you can always slide wooden dowel inside the PVC to keep it from bowing
good luck

wrote:
Will sch 40 pvc be ok for a 440 mhz boom? Or will it eventially warp in
the sun? (We have brutal summers sometimes).

Dennis Kaylor wrote:
... and you can always slide wooden dowel inside the PVC to keep it from bowing

I learned not to do that with fiberglass pipe. Moisture
made the wooden dowel swell and split the fiberglass pipe.
--
73, Cecil http://www.qsl.net/w5dxp


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Re the grey vs orange/white stuff (In VK at least)

The grey electrical conduit has graphite (I think) added and therefore
has some conductivity.

What I am getting at is that with a design using (say) white material
there will be slight dimension differences when using the grey stuff.
Apparently it isnt good to use it for a colinear etc design where the
radiating elemnt is inside the pipe.

Cheers Bob VK2YQA


wrote:
Will sch 40 pvc be ok for a 440 mhz boom? Or will it eventially warp in
the sun? (We have brutal summers sometimes).

"Topaz305RK" wrote in message
...
Have had CPVC break down and "go away" but never PVC.

Sam

Me too.
BUT painting is a good idea!
I use zinc chromate to prime,
and pale blue to hide the antenna!

Can't decide on the trim color though!