Since I don't plan on hanging off the side of the tower to operate my
station, isn't it more prudent to tune the entire system, flaws, feedline
and all if my main concern is what SWR my equipment, in my shack, sees?
Charlie
KI5XP
-Original Message-
From: [EMAIL PROTECTED] [mailto:elecraft-
[EMAIL PROTECTED] On Behalf Of Jessie Oberreuter
Sent: Thursday, September 18, 2008 1:42 AM
To: Bill W5WVO
Cc: LIST - elecraft; Cranz Nichols
Subject: Re: [Elecraft] K3 - Numeric SWR Display
On Wed, 17 Sep 2008, Bill W5WVO wrote:
Actually, looking at transmission line SWR at the transmitter is a
poor way to adjust an antenna. To get it right, you need to use a
complex impedance analyzer like the now-ubiquitous MFJ-259B (or
equivalant instrument), and put it as close to the antenna
feedpoint as possible. Adjust as close as you can get for Xc=0,
Xl=0, R=50. You can't do that with an SWR bridge! :-)
Alternately, feeding through one or more half-waves of coax will
give
you good accuracy while letting you get far enough away from the antenna
to not affect the measurement.
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