Bob,
Have just wound a coil on 4" grey UPVC, but before I did I whacked it into
the microwave, and it certainly didn't show any signs of warming.
Maybe they have removed the carbon?

73
John
VK2KC
"Bob Bob" wrote in message
...
Hi John

As I remember too if you use plastic conduit (in VK) the orange stuff
has no carbon but the grey stuff does. ie it has carbon mixed in when it
is extruded.

I don't know how good that info is, it's comes from way back in
anecdotal land. I just assume grey stuff is not to be used for radio
antenna system!

Not directly on topic but may be related.

Cheers Bob VK2YQA

VK2KC wrote:

My question is, does carbon fibre absorb RF?