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Jim Woodward
 
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Default How to use a simple SWR meter and what it means to your VHF

Thanks to Marcus for suggesting RG214 and Vito for the numbers. On
Swee****er it was about 110 feet from radio to antenna (82' in the mast,
plus radio to mast), so I worried about losses. The bare copper solid #10
AWG center conductor of 9913 won't corrode much, and the shield is tinned,
so it won't corrode much either.

On Fintry, it's only about 25' from radios to antennas, and the antenna end
is much closer to the sea, so I'll probably use RG214 unless someone has a
better idea. Besides, putting 259s on that #10 wire is a pain.


--
Jim Woodward
www.mvFintry.com


..
"Vito" wrote in message
...
Marcus AAkesson wrote:

On Wed, 12 Nov 2003 15:41:08 -0500, "Jim Woodward" jameslwoodward at
attbi dot com wrote:

4) What do you like other than the cheap white crap for antenna cable?

I
used Belden 9913 (solid center conductor) on Swee****er. Is that still

a
good choice?


RG214 or similar which is silver plated Cu in both conductor and
shield. Raw copper will in time oxidize and deteriorate in the salty
environment. I have seen some really ugly cables after only 5-6 years.


Check out http://www.therfc.com/attenrat.htm

Common RG-58A (the white crap) looses 7.4dB/100 ft at 200MHz. That's
over half your signal used to heat the coax! RG-8X (mini-RG8 - the other
white crap) is almost as bad at 5.4 dB/100'. Belden 9913 is excellent at
only 1.8dB/100. RG-214 has 3.3dB loss/100' but as Marcus suggests may
have better corrosion resistance. Of course if money, size and weight
are unimportant there's LDF5 (c: