[Elecraft] K3: 106W on 6m

[Stephen Prior]

Jim,

It's what the display of the K3 is telling me - Wayne has already
replied - it's a (temporary) mathematical curiosity with the firmware.

As a physics professor I'm acutely aware of the measurement problems
you describe!

73, Stephen G4SJP

On 13 May 2011 20:54, Jim Brown <jim at audiosystemsgroup.com> wrote:
> On 5/13/2011 12:21 PM, Stephen Prior wrote:
>> I have only just noticed that on 6m only, the maximum power output
>> that can be dialled up is 106W.  110W on all other bands.
>
> I would be VERY VERY interested in how you can reliably resolve the
> difference between 110 watts and 106 watts, or even how you're certain
> it's 106 watts.  The accuracy of a Bird 43 wattmeter is 5% of full
> scale. To measure 106 watts you need a 250W slug. 5% of that is 12.5
> watts.  Where did you get that slug? Do you have any assurance that it
> was calibrated?
>
> Perhaps another wattmeter?  Has it been calibrated against a known
> standard?  Do you know the frequency response of that meter?  That is,
> if it's calibrated at 14 MHz, is it also correct at 28 MHz?  At 50 MHz?
> How do you know?  That is, what voltage or current reference are you
> using to determine it?  When and where was that voltage or current
> reference last calibrated?
>
> 73, Jim Brown K9YC
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