On Thu, 03 Mar 2005 17:05:53 -0800, wrote:

Greetings
Does anyone know if typical schedule 40 PVC pipe is UV resistant? I
have some antenna projects in mind that will be built from this stuff.
I suppose I can paint it for some extra protection, but I was wondering
if it is necessary?

Thanks
Jim/K2TL

No, PVC is not UV Resistant...

"Korbin Dallas" wrote in message
news
On Thu, 03 Mar 2005 17:05:53 -0800, wrote:

Greetings
Does anyone know if typical schedule 40 PVC pipe is UV
resistant? I
have some antenna projects in mind that will be built from
this stuff.
I suppose I can paint it for some extra protection, but I was
wondering
if it is necessary?

Thanks
Jim/K2TL

No, PVC is not UV Resistant...

I have an antenna in a PVC case which has been on my roof (in the
SUN) for over ten years. When Can I expect the PVC to fail?

On Sun, 13 Mar 2005 16:25:06 GMT, "Clarence_A" wrote:


"Korbin Dallas" wrote in message
news
On Thu, 03 Mar 2005 17:05:53 -0800, wrote:

Greetings
Does anyone know if typical schedule 40 PVC pipe is UV
resistant? I
have some antenna projects in mind that will be built from
this stuff.
I suppose I can paint it for some extra protection, but I was
wondering
if it is necessary?

Thanks
Jim/K2TL

No, PVC is not UV Resistant...

I have an antenna in a PVC case which has been on my roof (in the
SUN) for over ten years. When Can I expect the PVC to fail?

As soon as you bring it down to AZ. I have a 120' run of 2" grey PVC
from the house to the tower. It's mostly above ground with a stake
and clamp every 10'. It looks like a snake, the top side turns color
and it's cracked in a couple of places.

"Wes Stewart" wrote
"Clarence_A" wrote
"Korbin Dallas" wrote in message
wrote:

Greetings
Does anyone know if typical schedule 40 PVC pipe is UV
resistant? I
have some antenna projects in mind that will be built from
this stuff.
I suppose I can paint it for some extra protection, but I
was
wondering
if it is necessary?

Thanks
Jim/K2TL

No, PVC is not UV Resistant...

I have an antenna in a PVC case which has been on my roof (in
the
SUN) for over ten years. When Can I expect the PVC to fail?

As soon as you bring it down to AZ. I have a 120' run of 2"
grey PVC
from the house to the tower. It's mostly above ground with a
stake
and clamp every 10'. It looks like a snake, the top side turns
color
and it's cracked in a couple of places.


That is not schedule 40 and I did not use the light irrigation
pipe. I have been in Arizona (for 29 years) and can not say I
ever used PVC for anything. I used Galvanized pipe for sprinklers
too. But that was about thirty years ago and before.

I However we had a pool heater from the black flex pipe which
lasted for many years. It is no good for RF though!

"resistant" is hard to define. I have a j-pole made out of PVC that has
been on the roof for almost thirty years. I suppose at some time it will
fail, but probably not in my lifetime. I certainly wouldn't expect it to
have the same pressure and burst characteristics if I was using it with
water pressure, but it seems to hold up well as an antenna structure.

My company has been making vertical dipoles using Schedule 40 PVC as the
"radome" for nearly twenty years, and as yet, not a single reported field
failure.

Jim


"Korbin Dallas" wrote in message
news
On Thu, 03 Mar 2005 17:05:53 -0800, wrote:

Greetings
Does anyone know if typical schedule 40 PVC pipe is UV resistant? I
have some antenna projects in mind that will be built from this stuff.
I suppose I can paint it for some extra protection, but I was wondering
if it is necessary?

Thanks
Jim/K2TL

No, PVC is not UV Resistant...