K2 frequency calibration

[Lowell-8]

Adjusting C22 to clalibrate the K2 frequency had absolutely no effect when using WWV or a frequency counter as reference.  I replaced C22, no change.  Continuity between C22 and U6 checks ok.  I suspicion a problem with U6.  Any comments?

                                    73, Lowell, W5FH
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[Vic K2VCO]

Lowell wrote:
> Adjusting C22 to clalibrate the K2 frequency had absolutely no effect
> when using WWV or a frequency counter as reference.  I replaced C22,
> no change.  Continuity between C22 and U6 checks ok.  I suspicion a
> problem with U6.  Any comments?

C22 only has an effect when you run CAL PLL. See the procedure at
<http://www.elecraft.com/Apps/K2%20C22%20Adjust%20App%20Note.pdf> for
the best way to calibrate the reference oscillator.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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[Don Wilhelm-3]

Lowell,

Adjusting C22 has no immediate effect.  You must do the entire procedure
of CAL PLL and CAL FIL before any change will be observed.
See the K2 Dial Calibration article on my website
http://w3fpr.qrpradio.com for details and procedures.

Lowell wrote:
> Adjusting C22 to clalibrate the K2 frequency had absolutely no effect when using WWV or a frequency counter as reference.  I replaced C22, no change.  Continuity between C22 and U6 checks ok.  I suspicion a problem with U6.  Any comments?
>
>                                     73, Lowell, W5FH
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[drewko]

Is the freq counter probe assembly available from Elecraft? I bought a
constructed K2 that doesn't have one included. I'm hoping I won't have
to lookup and order the crimp pins, housing and rg174 coax from
Mouser, etc. in order to make one up.

73,
Drew
AF2Z



On Sat, 05 May 2007 21:24:46 -0700,  Vic K2VCO <[hidden email]>
wrote:

>Lowell wrote:
>> Adjusting C22 to clalibrate the K2 frequency had absolutely no effect
>> when using WWV or a frequency counter as reference.  I replaced C22,
>> no change.  Continuity between C22 and U6 checks ok.  I suspicion a
>> problem with U6.  Any comments?
>
>C22 only has an effect when you run CAL PLL. See the procedure at
><http://www.elecraft.com/Apps/K2%20C22%20Adjust%20App%20Note.pdf> for
>the best way to calibrate the reference oscillator.

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[Don Wilhelm-3]

Drew,

Yes, it is K2FCTR and is priced at $10.  Om the Elecraft website, click
order and scroll down to 'Spare Parts and Mod Kits' (or something like
that) - it will lead you to it.  Or, you can make a phone call to order it.

73,
Don W3FPR



[hidden email] wrote:

> Is the freq counter probe assembly available from Elecraft? I bought a
> constructed K2 that doesn't have one included. I'm hoping I won't have
> to lookup and order the crimp pins, housing and rg174 coax from
> Mouser, etc. in order to make one up.
>
> 73,
> Drew
> AF2Z
>
>
>
> On Sat, 05 May 2007 21:24:46 -0700,  Vic K2VCO <[hidden email]>
> wrote:
>
>> Lowell wrote:
>>> Adjusting C22 to clalibrate the K2 frequency had absolutely no effect
>>> when using WWV or a frequency counter as reference.  I replaced C22,
>>> no change.  Continuity between C22 and U6 checks ok.  I suspicion a
>>> problem with U6.  Any comments?
>> C22 only has an effect when you run CAL PLL. See the procedure at
>> <http://www.elecraft.com/Apps/K2%20C22%20Adjust%20App%20Note.pdf> for
>> the best way to calibrate the reference oscillator.
>
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>
>

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[drewko]

RC,

You are correct. I do have the freq counter probe.

It is the RF probe that I need, if you have it. Otherwise, I can get
one from Elecraft.

BTW, this rig works great just as you built it! I didn't have the fun
of putting it together but I do enjoy going through the manual and
fiddling with alignment. I never could leave well-enough alone.

And thanks to all who replied about this.

73,
Drew
AF2Z


On Sun, 06 May 2007 07:24:42 -0700 (PDT), you wrote:

>Drew
>Do you mean the "RF probe" the freq counter probe is in the K2 and is left connected if I remember correctly
>RC kc5wa
>
>[hidden email] wrote: Is the freq counter probe assembly available from Elecraft? I bought a
>constructed K2 that doesn't have one included. I'm hoping I won't have
>to lookup and order the crimp pins, housing and rg174 coax from
>Mouser, etc. in order to make one up.
>
>73,
>Drew
>AF2Z
>
>

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