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KAT3 tuning bandwidth

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Steef PA2A

KAT3 tuning bandwidth

Hi,

On 80 meters I did some tuning and when I try the SWR about 12 KHz lower the tuner produces an extra click and the SWR is terrible again. It seems the tuner remembers segments of about 20 KHz.

Is it possible to keep the tuner in its tuned settings so it is not necessary to tune the complete band in 10 or 20 KHz steps?

73 's

Steef PA2A, K3 # 4654
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Guy, K2AV

Re: KAT3 tuning bandwidth

If the feedline antenna combination is such that a 1.5:1 segment is
only 20 kHz wide (a common enough occurrence) then one should take the
time to get tunings up and down. You can probably do it in a couple
of minutes. The K3 will shift seamlessly with your operating after
that. One of the benefits.

73, Guy.

On Sun, Aug 1, 2010 at 3:10 PM, Steef PA2A <[hidden email]> wrote:

> Hi,
>
> On 80 meters I did some tuning and when I try the SWR about 12 KHz lower the tuner produces an extra click and the SWR is terrible again. It seems the tuner remembers segments of about 20 KHz.
>
> Is it possible to keep the tuner in its tuned settings so it is not necessary to tune the complete band in 10 or 20 KHz steps?
>
> 73 's
>
> Steef PA2A, K3 # 4654
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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Steef PA2A

Re: KAT3 tuning bandwidth

Guy,

I did another experiment: I tuned on 14.250, 1:1.2 is the result. On 14.240 the same tuning values are used and the SWR is still 1:1.2 From 14.239.999 downwards the SWR is 1:8.3 with other KAT3 parameters. Up to 14.299.999 the SWR remains 1:1.3 and from 14.300 it is 1:6.7.

It seems that old KAT3 parameters on other antenna 's are remembered forever. After using the K3 at the IOTA last week there has been much tuning and now all bands should be retuned.

I don 't like this at all. A new feature would then be to reset the old KAT3 settings or to 'calibrate' the whole band automatically with the KAT3. And after that it is a little step to a complete antenna analyzer feature on the K3 hi!

73 's Steef PA2A
----- Original Message -----
From: Guy Olinger K2AV
To: Steef PA2A
Cc: [hidden email]
Sent: Sunday, August 01, 2010 9:35 PM
Subject: Re: [Elecraft] KAT3 tuning bandwidth

If the feedline antenna combination is such that a 1.5:1 segment is
only 20 kHz wide (a common enough occurrence) then one should take the
time to get tunings up and down. You can probably do it in a couple
of minutes. The K3 will shift seamlessly with your operating after
that. One of the benefits.

73, Guy.
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David Cutter

Re: KAT3 tuning bandwidth

That would be a great advantage.
David
G3UNA

>
A new feature would then be to reset the old KAT3 settings or to 'calibrate'
the whole band automatically with the KAT3. And after that it is a little
step to a complete antenna analyzer feature on the K3 hi!
>
> 73 's Steef PA2A

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Mike Short

Re: KAT3 tuning bandwidth

Perhaps that is something that could be done with the K3 utility? Sorry
Dick... ;)

Mike
AI4NS

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of David Cutter
Sent: Sunday, August 01, 2010 4:34 PM
To: Steef PA2A; [hidden email]
Subject: Re: [Elecraft] KAT3 tuning bandwidth

That would be a great advantage.
David
G3UNA

>
A new feature would then be to reset the old KAT3 settings or to 'calibrate'

the whole band automatically with the KAT3. And after that it is a little
step to a complete antenna analyzer feature on the K3 hi!
>
> 73 's Steef PA2A

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Steef PA2A

Re: KAT3 tuning bandwidth

In reply to this post by Guy, K2AV

Guy,

That works! I thought the tuner remained in the same position because no relay clicks were audible when turning the VFO across the band.

73 's Steef PA2A
----- Original Message -----
From: Guy Olinger K2AV
To: Steef PA2A
Sent: Sunday, August 01, 2010 11:35 PM
Subject: Re: [Elecraft] KAT3 tuning bandwidth

See page 56 in the user manual. Put the K3 on the band you want to
clear. Go to CONFIG:KAT3:LC SET. Tap CLR. This should clear the
memories for that band.
73, Guy.
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Brett Howard

Re: KAT3 tuning bandwidth

There are several solutions here...

1) Clear the memories for the band. Enter Config then go to KAT3 and
press CLR. This will clear your current ATU memories for that band
and 1 tuning will be used across the band but they will continue to be
learned as you tune.
2) Download K3EZ. This is a simple application which one can find by
doing a search. This application has a pane that will allow a user to
calibrate the K3 to their antenna on a per band/antenna basis.
3) Manually tune in every ATU window.

The ATU does stay put as you tune the VFO. Its settings are only
updated when you've crossed memory region boundaries and you transmit.
As soon as you transmit if you hear a click and the ATU icon flashes
that means that the K3 has recalled a tuning memory for you.

~Brett (N7MG)

On Sun, Aug 1, 2010 at 3:02 PM, Steef PA2A <[hidden email]> wrote:

> Guy,
>
> That works! I thought the tuner remained in the same position because no relay clicks were audible when turning the VFO across the band.
>
> 73 's Steef PA2A
> ----- Original Message -----
> From: Guy Olinger K2AV
> To: Steef PA2A
> Sent: Sunday, August 01, 2010 11:35 PM
> Subject: Re: [Elecraft] KAT3 tuning bandwidth
>
>
> See page 56 in the user manual. Put the K3 on the band you want to
> clear. Go to CONFIG:KAT3:LC SET. Tap CLR. This should clear the
> memories for that band.
> 73, Guy.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>