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Old January 6th 04, 11:02 PM
Dr. Slick
 
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"Mike" wrote in message ...
Hi Kevin,

If you have to cut bits off the coax to get the SWR down, your aerial isn't
resonant on the frequency being used. The coax is acting like part of the
aerial.
Get the aerial resonant and it doesn't matter what length of coax you use as
the SWR will not change.


This would be true assuming the transmission line is truly 50
ohms. It almost never really is.

I've asked this question before, and i got similar answers. The
point about losses in long lines improving the SWR are true of course.

But my point is that even if the antenna is a true 50 + 0j, if the
coax is not a true 50 ohms, and is more like 55 or 45 ohms, then the
length of the
coax WILL matter, in terms of the measured SWR.


Slick