Peter O. Brackett wrote:


A few months ago, I posted on here a few items of interest from the
detailed measurement and characterization work done world wide
by ETSI, ITU and ANSI and documented in ANSI T1E1.4
contributions on the details of the Zo of complex Zo transmission lines,
but there seemed to be little interest in such data from the NewsGroup
participants who seem to concentrate only upon short lossless,
distortionless
50 Ohm lines.

Being an RF guy, mostly, I am interested in
complex Z0 values of low loss lines, where
Imag(Z0) is no more than a few percent of
Real(Z0). I use exact equations in a Mathcad
program to get detailed answers. I find this
interesting and useful. The "classical" formula
for rho is quite satisfactory, for me.

Bill W0IYH