Hey Tom,
I don't think it is absolutely true that line loss is the only mechanism that
can increase system bandwidth. If the reactance change of the mismatched
line happens to work in opposition the reactance change of the load, then
then a lossless cable could in principle increase system bandwidth. This
certainly works when a series resonant circuit of proper loaded Q is placed
in front of a load with with an opposing reactance change versus frequency.
Unfortuntately, the direction and or rate of the reactance change is usually
wrong, so this technique only works in specific cases.
73 de Mike, W4EF.......
----- Original Message -----
From: "Tom Rauch" <w8ji@akorn.net>
To: <towertalk@contesting.com>
Sent: Wednesday, October 10, 2001 5:17 PM
Subject: Re: [TowerTalk] Re: Force12
>
> > Some years ago, Dave Leeson, now W6NL posted the
> > explanation here on Tower Talk. The length of line creates a
> > double tuned transformer which per theory does, in fact,
> > increase the "system" bandwidth. It is NOT added loss, it is
> > a form of matching transformer.
>
> Perhaps you misunderstood what was said, because that is clearly
> not correct.
>
> The only mechanism that increases bandwidth is loss in the line.
> Nothing else.
> 73, Tom W8JI
> W8JI@contesting.com
>
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