[Elecraft] KX3 atu anomalies - or it is me.

[Mike WA8BXN]

I use an LDG tuner at a remote location from my rig. I see something similar
to what is being discussed at times. Sometimes it will stop tuning (perhaps
quickly) when it gets a match slightly below 2:1. Other times I get a much
better match. The reason I assume is the algorithm used in the tuner. An SWR
ratio of 2:1 is not bad at all. The difference between 1.3 and 1:1 really is
not worth talking about. Part of the situation is an optimization in the
tuner algorithm. Some tuner programmers assume you would prefer a quick tune
to something below 2:1 rather than waiting a few seconds more for what may
or may not be a better match. 

73 - Mike WA8BXN

 
 
 
-------Original Message------- 
 
From: NU7B 
Date: 9/19/2012 10:46:23 PM 
To: elecraft at mailman.qth.net 
Subject: Re: [Elecraft] KX3 atu anomalies - or it is me. 
 
I can report that I see the same symptoms as Luca does, on my KX3 #1690 with

latest FW V1.12 and KXAT3. When I use the "Tune" button on my antenna for, 
say, 30 meters, I get a VSWR readout from the display of 1.3:1. Then I 
engage the internal ATU to bring that to 1:1. At that point, if I put the TX

back in Tune mode to send a carrier - the display shows the same VSWR as it 
did before the ATU was exercised. 
 
ATU mode is set to Auto. All measurements read from the KX3 display. 
 
Steve NU7B 
 
 
 
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