me.merritt wrote:
Hi all,

I am working on an application of transmission lines for use in
magnetic resonance. I know I have seen in the past pre-made
transmission line that has an inner conductor surrounded by a white
insulator ( I think it is Kel-F, it may be teflon) and a copper layer
on the outside. It is quite stiff, and comes in long pieces that can
be bent with a little effort. Does anyone know where I can pick some
of this up? I have been through about 200 google pages with no luck.

Thanks

Micro Coax (http://www.micro-coax.com/) is one source for semi-rigid coaxial
cable, and comes in (IIRC) up to 8' lengths. The stuff isn't cheap,
though... be prepared to empty your wallet!

Regards,
Bryan WA7PRC