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Old November 6th 08, 01:54 PM posted to rec.radio.cb
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First recorded activity by RadioBanter: Sep 2008
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Default This Place is a Sewer

On Oct 28, 10:04*am, Jay in the Mojave wrote:
Hello Jim:

Yeah 18 feet seems top work well in a mobile installation. Why is that?

Is it because the antenna puts RF Energy on the coax outer shield due to
a lack of ground surface. In all my antennas installs it seems that way.

So 18 feet of coax is roughly 3/4 of a wavelength, ( with a velocity
factory of .66) and any RF Energy coming back will have to come back
thru another 3/4 wavelength of coax.

Maybe that length vs wavelength is the best to use. Your comments....

Jay in the Mojave

jim wrote:

* Feed length 'does' make a difference



when calculating swr - Hide quoted text -


- Show quoted text -


idiot
 
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