On Sat, 08 Jan 2005 19:30:03 GMT, "Phil" wrote:


"art" wrote in message
roups.com...
I was just given a coil of 7/8 hardline coax that I have not seen
before.
It has plastic discs inside to separate the core from the outer
aluminum tube which I suppose uses air as the dielectric. Anybody got
any info on this stuff
and any advantages it may have over the normal hardline cable?
Regards
Art


Look on Google for "fused disc" AND "cable".

Most Cable TV companies stopped using it when they started using frequencies
above 300 MHz.

This cable acts as a filter around 350 MHz.

I used to use a lot of the 3/4 " foam filled CATV line and still have
probably 200 to 300 feet left. At HF it works well and does not
require matching sections unless the operator is a perfectionist.

It's much more rugged than the fused disk stuff and water isn't
normally a problem.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com