RE: K2 spot function is off - update

[Andrew Moore-4]

An update on the spot function problem I had with my K2:

After a few more calibrations I found the spot problem to persist.  I finally tried testing it with a different transceiver instead of the KX1, and the spot function is working properly.  As it turns out the KX1 was improperly calibrated -- not the K2!  I calibrated the KX1 and now everything is working well.

Thanks for the input,
--Andrew

> Andrew,
>
> There is a lot more than just the SPOT frequency that needs to be adjusted.
> The manual settings will get you into the ballpark, and I would call your
> 120 Hz error 'in the ballpark'.  You can adjust the pitch of your sidetone
> in the K2 menu
>
> If you want to do better, you will have to set the K2 reference oscillator
> accurately, do a CAL PLL and set the BFOs to properly position the filter
> bandpass at your chosen sidetone pitch.  When you have completed that, you
> will find the dial display and transmit frequency to be correct within 20 to
> 30 Hz.
>
> The full instructions to accomplish the dial calibration can be found on my
> website http://w3fpr.qrpradio.com or mirror at www.qsl.net/w3fpr and
> http:/home.earthlink.net/~w3fpr.
>
> 73,
> Don W3FPR
>
> > -----Original Message-----
> > From: [hidden email]
> > [mailto:[hidden email]]On Behalf Of Andrew Moore
> > Sent: Thursday, June 30, 2005 8:12 PM
> > To: [hidden email]
> > Subject: [Elecraft] K2 spot function is off
> >
> >
> > I've built and calibrated K2 #4958.  If I use the spot function
> > to tune to the exact frequency of another transceiver, the end
> > result is I'm actually off by about 120 Hz or so.  I've
> > recalibrated a couple times, and my display seems accurate
> > (judging by WWV anyway).  I'm using a 600 Hz sidetone pitch.
> > After calibrating the displayed frequency, and making adjustments
> > to the trimmer near the 4 MHz osc on the control board, I've done
> > a CAL PLL followed by a CAL FIL (using suggested values from the
> > manual, not using spectrogram...) yet the spot function seems to
> > be off by the same amount every time.
> >
> > How does one adjust spot?
> >
> > Thanks,
> > --Andrew, NV1B
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