Instead of looking for that long piece of flexible low-loss cable, why not
procure a very short length of low-loss semi-rigid cable bent in to the proper
shape to allow for the opposite polarization.  Up to 6 GHz I would think the
loss of that bent section would be low enough to be insignificant, so that
your overall cable loss would be no different for your two different
polarizations.  If you’re a purist, you could have two identical lengths of
this short semi-rigid, each formed for a specific polarization, and that way
your cable losses would be identical to two decimal places to the right of the
decimal point.
 
Ken Javor

Phone: (256) 650-5261



________________________________

From: "Kunde, Brian" <[email protected]>
List-Post: [email protected]
List-Post: [email protected]
List-Post: [email protected]
Date: Tue, 15 Jul 2008 16:20:03 -0400
To: <[email protected]>
Conversation: Low Loss Coax Cable
Subject: Low Loss Coax Cable

What coax cable types do you recommend for a very low loss cable up to 6Ghz
but also flexible?  I need a good low loss cable to connect between my horn
antenna and the floor connection of my Heliax.  The cable only needs to be 5
or 6 feet long but flexible enough so I can change polarization on my antenna.
 
 
I have looked at many cable types in catalogs and on-line but you cannot tell
if it will be flexible without seeing it for real.  I ordered a cable called
“Helical Super Flex”.  I liked the low loss properties but it was not at
all flexible, let alone super flexible.  It was barely semi-rigid in my book .
 
 
I tried RG393/U but it is not very flexible and I prefer a lower loss cable if
possible. 
 
What do you all recommend?  What is the best?  Where can I buy it in small
quantities and possibly in custom lengths?
 
Thanks to all in advance.
 
The Other Brian
 
 
 
 
 
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