"Richard Clark" wrote in message
...
On Tue, 5 Feb 2008 15:06:40 -0800 (PST), Dave99
wrote:

OK thanks... Actually I was reading something that indicated you
should add in a velocity factor for the tube when using it as a
sleeve. I had never heard of that either, so I wasn't sure. They used .
95 I believe.

Hi Dave,

I presume you mean 0.95, which for a metal tube holding an inner
conductor that is air insulated, then that might be operative. Too
much is left unsaid: like frequency/wavelength, size of tube, any
inner conductor (so as to emulate a coax), any coax within the tube
(to further compound the issue), the length of tube.... in other
words, a lot of missing details. Some are suggestive in your use of
the term sleeve, but you don't provide much to help.

So I guess you would go coax center conductor to tube section #1,
braid to center of second coax through section #1 to section #2. Coax
from section #1 through section #2 to section #3 and so on?

So, what is #1, #2, #3, and so on? I get the impression you have a
vivid image of this in front of you, but you are blocking the view and
I can't see it.

73's
Richard Clark, KB7QHC

Hi Richard

Is it possible that dave is considering one of these
http://www.nodomainname.co.uk/Omnico...4collinear.htm ?

Jerry KD6JDJ