K3 - ATU Tune

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K3 - ATU Tune

L. D. Ingram
Hi,

Something curious has happened to my K3 SN 3975 - when I tap the ATU
Tune button the power out shown on an external power meter is full
power, a little over 100W. The K3 power out indicator also kicks up
to full power. I have the unit set to 50W and when I key it normally
(CW) it shows 50W on both the external and internal meters. The SWR is fine.

Any thoughts on anything I might have done to cause this?

Larry Ingram  AG4NN

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Re: K3 - ATU Tune

Nate Bargmann
* On 2010 29 Oct 15:45 -0500, L. D. Ingram wrote:
> Hi,
>
> Something curious has happened to my K3 SN 3975 - when I tap the ATU
> Tune button the power out shown on an external power meter is full
> power, a little over 100W. The K3 power out indicator also kicks up
> to full power. I have the unit set to 50W and when I key it normally
> (CW) it shows 50W on both the external and internal meters. The SWR is fine.
>
> Any thoughts on anything I might have done to cause this?

What is CONFIG:TUN PWR set to?  I have mine set to 025 for 25 Watts
which is plenty for me.

73, de Nate >>

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Re: K3 - ATU Tune

Stan Gibbs, KR7C
In reply to this post by L. D. Ingram
The power level used by the ATU Tune process is internally set to 5/10W. As for the K3 power display, during the tuning process, the scale changes from a max of 100W to a max of 10W. I can't say why your external meter appears to indicate 100W, but is it possible that your meter is auto-ranging and you are misinterpreting it?  

L. D. Ingram wrote
...when I tap the ATU Tune button the power out shown on an external power meter is full
power, a little over 100W. The K3 power out indicator also kicks up
to full power.
73, Stan - KR7C
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Re: K3 - ATU Tune

L. D. Ingram
In reply to this post by L. D. Ingram
Hi again,

Stan KR7C hit it on the head, the external meter is autoranging and
the output is 10W not 100 (red face on this).

Thanks Stan and others who answered.

Larry Ingram  AG4NN

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