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Old April 12th 10, 04:22 AM posted to rec.radio.amateur.antenna
Jeff Liebermann[_2_] Jeff Liebermann[_2_] is offline
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First recorded activity by RadioBanter: Jun 2007
Posts: 1,336
Default Wire glue...a possible help for using CATV line for amateur applications??

On Sun, 11 Apr 2010 19:56:43 -0700 (PDT), Dave Smirkenberg
wrote:

Today while putzing in my attic I came across a roll of about 200 ft
of 75 ohm CATV cable that I stashed there when I moved in back in
2002. Well, the reason I never used it for anything in the first place
was the hassle involved in attaching reducing adapter like a UG/176-U
to the aluminum foil shield. It hit me that this "wire glue" might be
a decent way of doing so.


If the cable is RG-59/u, consider leaving it in the attic until it
rots. If it's RG-6/u, it can be used for ham radio purposes. Instead
of the proposed UG-176/u to PL-259 adapter kludge, just install the
correct compression type F connector on the ends of the RG-6/u and use
adapters to go to PL-259 or whatever. You'll find that the 75 to 50
ohm mismatch loss is rather minimal.
http://www.qsl.net/n9zia/wireless/75_ohm_hardline.html

As for the wire glue, due to the lack of a suitable manufacturer and
part number that can be researched, my guess(tm) is that it's much
like "metallic epoxy", which is nothing more than aluminum or graphite
powder mixed into the epoxy. The particles are quite far apart from
each other, resulting in extremely poor conductivity. Since RF likes
to flow on the surface of conductors, such glues are going to have a
fairly high surface resistance, and are therefore useless for RF.

--
Jeff Liebermann
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558