On 26 Mar 2007 17:01:36 GMT, Ed
wrote:

With all other aspects of it remaining the same, there
certainly is a significant difference in loss figures when the dielectric
is changed from solid to foam.

Hi Ed,

Actually, all other aspects do not remain the same when you go from
one dielectric to the other.

The size of the inner conductor changes, and with it so does loss. The
loss is in the conductor, not the dielectric.

73's
Richard Clark, KB7QHC