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THE AM BULLETIN BOARD => Technical Forum => Topic started by: wavebourn on February 08, 2005, 07:48:25 PM



Title: Ethernet cable
Post by: wavebourn on February 08, 2005, 07:48:25 PM
Hi!
Is 10-base-5 cable (802.3) usable for antennae feeding?

(http://wavebourn.com/images/10base5.jpg)


Title: Ethernet cable
Post by: Barry on February 08, 2005, 10:07:55 PM
I think that is called 10base5 it is like a quad shielded RG8.

It has 50 ohm characteristic impedance  and I have used it to make coax jumpers between various pieces of equipment.

The only problem with it is that it is very stiff and heavy. (not flexible ;-)

You would need some real support to feed any type of wire antenna that was off the ground with it.

Barry


Title: Ethernet cable
Post by: W2VW on February 08, 2005, 10:23:49 PM
No fun to install connectors but otherwise just great stuff. I like the yellow jacket.


Title: Ethernet cable
Post by: wavebourn on February 08, 2005, 10:53:41 PM
Oops... Sotty for typo, however I mean 10-base-5! Corrected.
So, your opinion is that it is better than usual RG, electrically?


Title: Ethernet cable
Post by: W2VW on February 08, 2005, 11:07:20 PM
The stuff I have here is Belden 9880 Ethernet Coax.  It might hold up a little better under high SWR conditions and the shield is certainly better than most RG-8.
More info here:

http://lists.contesting.com/archives/html/Towertalk/1997-02/msg00184.html


Title: Ethernet cable
Post by: wavebourn on February 08, 2005, 11:53:36 PM
Thanks Dave, it is a good idea to check if it has some vampire punctures!
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