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?