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

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Subject: [AMPS] Re: The Worldwide, No Holds Barred, SWR Quiz.
From: measures@vcnet.com (measures)
Date: Tue, 5 Oct 1999 01:09:18 -0700
>
>On Monday, October 04, 1999 1:40 PM, Vic Rosenthal
>[SMTP:rakefet@rakefet.com] wrote:
>> 
>> measures wrote:
>> > 
>> > >What is the SWR as measured at the generator with a 50-ohm
>> > >characteristic-Z  SWR meter?
>> > 
>> > ? At the end of an any characteristic.-Z halfwave transmission line,
>the
>> > termination Z repeats itself --  with a reactance reversal.  .
>Since
>> > there is no reactance in this termination, the Z at the end of the
>93-ohm
>> > halfwave line is 50 +/- j0 ohms, the SWR is 1:1.
>> 
>> No.  It is correct that the impedance seen by the generator is 50 ohms
>but the
>> SWR is unchanged, regardless of the line length.   The SWR is entirely
>> determined by the impedances of the line and the load.
>>
>
>Yes. From what everyone's told me, this is 1.86:1 (93/50) regardless of
>the line length.
>The Z looking into the cable is 50 ohms, but there's standing waves on
>it from the load/cable mismatch.
>Those SWs don't change (or go away) because the Z changes.

?  How do these standing waves remain invisible to the SWR meter at the 
halfwave measuring point? 
>......
-thanks.  

-  Rich..., 805.386.3734, www.vcnet.com/measures.  


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