[AMPS] Re: The Worldwide, No Holds Barred, SWR Quiz.

[rakefet@rakefet.com (Vic Rosenthal)]

measures wrote:
> 
> Vic wrote:
> >Not correct!  A generator would see a 50 ohm load at this point, and would be
> >able to match it as well as in the case of an arbitrary length of 50-ohm coax
> >feeding a 50-ohm load.  However, the SWR on the coax is still 1.86 to 1.
> 
> Where on the coax?

Anywhere on the 93-ohm coax.  Now, IF you hooked a 50-ohm SWR meter to the end
of 1/2 wavelength of 93-ohm coax, THEN you would get 1 to 1 -- because you would
in effect be measuring the SWR on the tiny piece of 50-ohm coax that constitutes
the 50-ohm bridge!  You are using the 1/2 wavelength of 93-ohm coax to trivially
transform the 50-ohm load to 50 ohms, and you are connecting a piece of 50-ohm
coax to it.  Of course the SWR is 1 to 1, on the 50-ohm portion of the system.

73,
Vic, K2VCO
Fresno CA


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