[Amps] Input SWR revisited

[Robert Carroll]

Those are what I use as well.  I think they are the
best around.  I hope ARRL keeps including them in
handbooks.
73
Bob

-----Original Message-----
From: Amps [mailto:amps-bounces at contesting.com] On
Behalf Of Paul Christensen
Sent: Wednesday, January 14, 2015 7:24 PM
To: amps at contesting.com
Subject: Re: [Amps] Input SWR revisited

>  These days such calculations are most
easily  done on a computer but an understanding of the
Smith chart  and the equations it is based on will help
in understanding how the match is taking place.  There
are many good and simple guides to the Smith chart on
the internet as well as in the ARRL handbook.

Good advice.  Everyone has their preferred way of
learning.   Me, I need to 
see interactive relationships.  Reading about the Smith
Chart never gave me a clear understanding of what was
going on.  It wasn't until the release of the TLD, TLW,
and SimSmith programs that things finally came
together.  In addition to being useful, practical
tools, they also serve as great learning tools.

In TLD, you can quickly make changes to a hypothetical
complex load, line type, and line length while
simultaneously watching SWR, loss, dynamic bar chart
showing line wavelength, and a Smith Chart.  TLW let's
you design a matching network with the ability to try
different network types. 
Sometimes, I'll start a problem in TLD then finish it
in TLW.   Usage of all 
three programs is free.

Paul, W9AC 

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