"Ian Jackson" wrote in message
...
But, when the coax is stretched, what happens to the characteristic
impedance and the loss? [This is a (sort of) serious question!]
--
Ian

If the ratio of the conductors stay the same, there should not be a change
except the losses go up. As you streach the coax, the shield and the center
conductor will get smaller. Also the dialectric will have to get smaller.
If they do not srink at the same ratio, the impedance will change depending
on which conductor gets smaller the fastest.

The losses will go up because the center conductor and the outer conductor
are smaller. This is the simple IR loss of the conductors. It is the same
as going from a rg-8 to a rg-58 type coax.