But only if the line length is a quarter wave electrically or an odd
multiple
73
Peter
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Dan Zimmerman N3OX
Sent: Dienstag, 25. August 2009 22:50
To: towertalk@contesting.com
Subject: Re: [TowerTalk] RG11 Cable
>
> By what math? A 50 ohm (purely resistive) antenna is a 1.5:1 mismatch to
> 75 ohm coax (and an antenna that is 50 ohms but not resistive would be a
> mismatch to 50 ohm line). The SWR falls along the length of any real
> transmission line due to line loss,
The 1.5:1 SWR circle for lossless 75 ohm line intersects the real axis at 50
ohms and 112.5 ohms resistive.
112.5 ohms resistive is 2.25:1 50 ohm SWR when you transition back to a 50
ohm system
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