Hi Jim

Even 101 nylon has a problem like that. When you machine it after its
been sitting on the shelf for a few months you find the diameter has
increased from water absorbtion.

Cheers Bob


Jim Lux wrote:


If you're really obsessing, the loss varies quite strongly with
humidity. PVC readily takes up and releases moisture from the atmosphere.

Tnxs John

Good to know...

Cheers Bob VK2YQA

VK2KC wrote:
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?