Re: [TowerTalk] coax 'sweet lenght'

[Pete Smith <n4zr@contesting.com>]

On the other hand, if the load is not matched to the transmission line, 
which happens in the real world a lot, a transmission line that is a 
multiple of 1/2 wavelength will at least make sure that the antenna's 
feedpoint impedance is not transformed by the transmission line, and that 
the apparent resonance does not change.  This may make no difference (it 
doesn't here) but may help to explain the idea of the "sweet spot."

73, Pete N4ZR

At 11:13 AM 10/10/2004, Tom Rauch wrote:

> A large change in transmission line loss can also cause SWR
> to be gradually changed along the line, but it is a smooth
> slope and does not have peaks and valleys every 1/4 wl.
>
> So as Dave says, it is a myth that a line feeding a single
> antenna  has a specific "sweet length". If the system is
> behaving properly, SWR is constant.
>
> 73 Tom
>
>
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See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.

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