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

[Terry Schieler]

I have experienced exactly what Mike has described below.  I found that auto tuners in my old Kenwood TS850-S/AT, my LDG, my K3 and others seem to get to a "reasonable" match then stop.  In most every case a second press of the tuner button would, in just a few milliseconds, give a totally flat reading.  My SGC-230 reacts the same way.  If you are insistent on a flat SWR reading, try a second "press".  

73,

Terry, WØFM


-----Original Message-----
From: Mike WA8BXN [mailto:hubby2k at hotmail.com] 
Sent: Wednesday, September 19, 2012 10:21 PM
To: elecraft at mailman.qth.net; NU7B
Subject: Re: [Elecraft] KX3 atu anomalies - or it is me.

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