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Old June 2nd 09, 01:08 PM posted to rec.radio.amateur.antenna
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Default SWR variation with feedline length

Roy Lewallen wrote:
It never
measures the SWR on any transmission line outside itself.


Another way of saying it is that the Bird directional
wattmeter Thruline establishes a Z0=~50 ohm environment
within the instrument itself.
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com
 
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