Posted by
Don Wilhelm-4 on
URL: http://elecraft.85.s1.nabble.com/Secret-to-K2-calibration-programming-tp2613860p2613920.html
Mike,
First there is up to a +/- 20 Hz tolerance that can be attributed to the
K2 DAC, so "dead nuts on" may not actually be achievable, but you can
get close. First question is - what are you using for a reference? How
much do you trust its frequency accuracy? That is one potential source
of error.
Secondly, you are reporting discrepancies up to 500 Hz, and that is more
than is to be expected after doing the K2 dial calibration.
I suggest you go to my website www.w3fpr.com and look at the article
dealing with K2 Dial Calibration. Follow the 3 steps mentioned in that
article, and then re-check the calibration. The 4 MHz reference
oscillator must be set before any other step. Use the N6KR method when
setting the reference, and I highly recommend observing the WWV
transmitted tones with Spectrogram to determine the correct tuning of
WWV. Accuracy in setting the reference is critical to the result -
allow your K2 to warm up for an hour or more before attempting to set
the 4 MHz reference.
73,
Don W3FPR
Mike-WE0H wrote:
> OK, here the deal. My K2 S/N 6698 doesn't have the same freq offset on
> all the bands. How can I program that so it is dead nuts on every band?
> Here's the freq measurement spots and what the radio is showing as a
> center freq using Spectrogram.
>
> Signal freq then radio's displayed freq...
> 1.90000 1.90003
> 3.90000 3.90003
> 5.50000 5.50003
> 7.20000 7.20003
> 10.1000 10.1004
> 14.2000 14.2005
> 18.5000 18.5005
> 21.2000 21.2000
> 24.9000 24.9001
> 28.2000 28.2001
>
>
> See how it is not the same offset across the bands? Something funny is
> going on here...
>
> Thanks for the help.
>
>
> ------------------------------------------------------------------------
>
>
> No virus found in this incoming message.
> Checked by AVG - www.avg.com
> Version: 8.0.238 / Virus Database: 270.11.48/2049 - Release Date: 04/09/09 06:09:00
>
>
______________________________________________________________
Elecraft mailing list
Home:
http://mailman.qth.net/mailman/listinfo/elecraftHelp:
http://mailman.qth.net/mmfaq.htmPost: mailto:
[hidden email]
This list hosted by:
http://www.qsl.netPlease help support this email list:
http://www.qsl.net/donate.html