: [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
“...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...”
Don’t forget that unless your transmission
This is most likely a firmware bug, and now on my list (thanks).
However, the difference between 1:1 and 1.3:1 is completely irrelevant
on air. So the workaround for now is: relax, and keep bugging me to
fix it one in awhile :)
73,
Wayne
N6KR
On Sep 19, 2012, at 7:44 PM, Surfshot wrote:
My ATU acted erratically. Sometimes fast tunes and sometimes nothing.
Changing SWR in the middle of transmission. I asked Elecraft for replacement
and it is coming.
Ignacy
--
View this message in context:
Lucia,
The KX3 SWR reoports the input value to the KXAT3 that it has found
after tuning. That value may be quite different than the SWR measured
at the antenna.
If you want to check the calibration of the SWR metering in the KX3. set
the ATU MD menu parameter to BYPass and do a TUNE.
OTOH,
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
Thank you Steve, that doesn's make happy but at least I don't feel like an
alien.
Luca
W6LDM
On Sep 19, 2012, at 7:38 PM, NU7B azstef...@mac.com wrote:
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
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@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
Hi Mike:
What you are describing is not what I am describing, and this thread has
taken a few tangents from a central observation. Yes, the same ATU can
converge to different solutions because of algorithms and starting points.
Yes, it is important to be precise about what your reference point is
So...
I think I have an explanation for what I am seeing. My antenna is a
off-center fed stealth random wire suspended from a tree near the QTH. I
feed it via 10 feet of ladder line connected to an SGC130 remote autotuner,
fed by 100 feet of coax into the house. Of course the antenna is the right
Hi,
I completed my KX3 #1715 few days ago and today I went to the park and using a
Buddipole I tried to make some contacts. Buddipole swr was 1.4 on 20m so I used
the ATU. It worked fine lowered the swr to 1.0 but then I transmitted I still
could read a 1.4 swr. I moved up and down the band
Lucia,
You say that you had an SWR of 1.4, then used the ATU which lowered the
SWR to 1.0
OK, That was on the KX3 display.
Please tell us where you were reading the continued 1.4 SWR. The KX3
display does not show the SWR during transmit - only during a TUNE.
The SWR shown externally to the
Hi Don, I read the 1.4 SWR on my MFJ 259b then tuned with the KX3 atu to 1.0
On transmitting the swr graph showed peaks near to 2 and if I press the XMIT
(tune) the reading is about 1.4 same as without ATU.
Luca
On Sep 18, 2012, at 7:12 PM, Don Wilhelm w3...@embarqmail.com wrote:
Lucia,
Lucia,
Is your KX3 menu parameter for the ATU MD set to AUTO If not, the
results may be as you have experienced.
73,
Don W3FPR
On 9/18/2012 10:36 PM, luca de marinis wrote:
Hi Don, I read the 1.4 SWR on my MFJ 259b then tuned with the KX3 atu to 1.0
On transmitting the swr graph showed
Lucia,
The Elecraft tuner (I don't care if it is a KAT2, KAT1, KXT1 o KXAT3)
cannot change the the SWR of the antenna itself. The ATU will tune the
antenna to an acceptable SWR so the PA transistor in the transceiver
are happy. If you measure the SWR between the Tuner and the antenna,
you
Hi Don, yes I agree with you that if I measure the swr between the radio and
the antenna I will have the same value I measured with the antenna analyzer.
The Automatic Tuner is installed and the mane ATU MD on AUTO
My point is:
Why do I read ON THE KX3 swr GRAPH a peak value close to 2.0 when
By SWR graph, you mean the bar graph on the display of the KX3, right? If so,
are you sure it is set to measure VSWR rather than compression?
If you have initiated a tuning cycle with the KXAT3, and subsequently hold the
XMIT/TUNE button, and the radio reports a VSWR of 1.4, then this means
Thank you Matt,
By SWR graph, you mean the bar graph on the display of the KX3, right? If
so, are you sure it is set to measure VSWR rather than compression?
No, I read it on the SWR of course.
If you have initiated a tuning cycle with the KXAT3, and subsequently hold
the XMIT/TUNE
On 19/09/2012, at 2:47 PM, luca de marinis surfs...@gmail.com wrote:
If you have initiated a tuning cycle with the KXAT3, and subsequently hold
the XMIT/TUNE button, and the radio reports a VSWR of 1.4, then this means
that the KXAT3 has not matched the impedance of the antenna system. This
On Sep 18, 2012, at 10:00 PM, Matt Maguire vk2...@gmail.com wrote:
On 19/09/2012, at 2:47 PM, luca de marinis surfs...@gmail.com wrote:
If you have initiated a tuning cycle with the KXAT3, and subsequently hold
the XMIT/TUNE button, and the radio reports a VSWR of 1.4, then this means
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