http://elecraft.85.s1.nabble.com/K3-Beta-firmware-rev-2-80-Improvements-to-AFSK-A-DATA-A-SSB-AM-FM-DVR-tp2305650p2328822.html
Not quite ... If you set the power level to exactly 5.0 or 50
watts and press the Tune button the K3 will recalibrate. If
recalibrate.
> -----Original Message-----
> From:
[hidden email]
> [mailto:
[hidden email]] On Behalf Of David Lankshear
> Sent: Saturday, February 14, 2009 7:56 PM
> To:
[hidden email]
> Subject: Re: [Elecraft] K3 Beta firmware rev. 2.82
>
>
> So, if I'm tuning up through, say, a Z-Match into a doublet
> and power output
> is set to "around" 5 or 50W and press "Tune" in order to
> tweak the Z-Match,
> the initial (off-tune) complex impedance the K3 may see could
> very well
> cause the K3's output power to change to 5 or 50W and because
> of that, power
> indication would be screwed up without my noticing it?
> (Sorry for the long
> sentence, but BTDT.)
>
> Surely, for something that is a calibration feature, it needs to be
> protected by an "on/off switch"? It isn't as though this is
> a new topic.
> I've seen it crop up a number of times in different forms on
> this reflector
> and have been waiting for the Aptos wizards to make power
> calibration a menu
> item. Turn it on in the menu, have a few LED winky-blinkys
> to warn you're
> in Power Cal., do the job then turn it off in the menu. I
> suppose there's
> some horribly technical reason for not doing it.
>
> DaveL G3TJP
>
> Julian said:
> > Why on earth not? I think you are confusing the situation with what
> > happens when you press TUNE at 50 watts (which I personally
> think is a
> > disaster that has already happened on many occasions, but that is
> > another matter.)
>
> Joe said:
> To normalize the radio's output power for any valid test you
> need to measure the single tone carrier power (e.g., CW). If
> you do that (press tune at 50 watts), you will recalibrate.
> The recalibration will render any subsequent measurement
> incompatible with previous measurements.
>
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