[Elecraft] K3 SWR Accuracy - reprise

Kok Chen chen at mac.com
Wed Nov 4 19:55:59 EST 2009


On Nov 4, 2009, at 4:41 PM, Steve Ellington wrote:

> 4. Example: A full wave dipole center fed with 50 ohm coax. SWR reads
> infinite at the antenna but with 1/4 wavelenth of coax, SWR reads low!

Nope -- the *impedance* at the end of a 1/4 wave transmission line  
when it is looking at a very large impedance, is close to zero,  
therefore the SWR remains close to infinite.  The SWR definitely won't  
read low unless there is something wrong with the instrument.

73
Chen, W7AY



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