"Dr. Barry L. Ornitz" wrote in
:

"Jim Kelley" wrote in message
...

For a more quantitative illustration of how distributed reactance in
transmission lines causes delay see
http://www.rhombus-ind.com/dlcat/app1_pas.pdf

73, ac6xg

In graduate school, more years ago than I care to admit, I scrapped a
surplus computer for parts. The computer had been custom built for
the Savannah River nuclear facility. In addition to the many hundreds
of 2N404A germanium transistors, I found the core memory made of
ferrite cores about 0.1 inches in diameter and about 30 mils thick.
But the most unusual thing, at least to me, was a flexible coaxial
cable about six feet long made of a ferrite-loaded rubber core wound
with 40 gauge enameled wire, wrapped in a thin cellulose acetate film
(Scotch tape?), covered with a braid shield with a vinyl covering. Of
course, it was a distributed delay line. I never measured its
impedance and delay properties accurately, but the cable had a
significant delay that could easily be seen on a 5 MHz bandwidth
scope. Even with an approximate termination, the cable's losses were
quite high.

Do you think this might have been a Distortionless Line?

Owen