K2 #4785

[M1MGD1]

Hi all.
 
K2 #4785 is well under way no major problems yet.
my kit was supplied with inductor L31 10uh.
but due to xtal not being 'rubber' enough ref Gary at support,
to give me the correct pll range.
I am waiting on a replacement for L31 with a value of 12uh
The manual states a prefered range of 9.8  to 15kHz my range was  9.06.
I have noticed on the elecraft website under builder resource(after  removing
part grrr)
that a range of 8.8 to 18kHz is ok, can someone explain these values,
oh by the way I have cut out and destroyed in the process the 10uh  choke so
I have to
wait for replacement, comments on cutting out parts before replacements  
arrive
would not be helpfull at this stage i know im a fool hi.
The big question is did I need to worry in the first place
looking forward to replys.
 
Mick  M1MGD>
 
 
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[Mark J. Schreiner]

I'm just at the point of testing the PLL Reference Oscillator Range as
well and am measuring 9.11 kHz.  This is low compared to the spec of 9.8
to 15 kHz per the manual.  Before I proceed to much farther, is 9.11 kHz
okay as is?  Should I be getting a 12 uH replacement L31 as well?  What
is the downside of leaving it as is?

Mark, NK8Q
K2 S/N 4786

[hidden email] wrote:

>Hi all.
>
>K2 #4785 is well under way no major problems yet.
>my kit was supplied with inductor L31 10uh.
>but due to xtal not being 'rubber' enough ref Gary at support,
>to give me the correct pll range.
>I am waiting on a replacement for L31 with a value of 12uh
>The manual states a prefered range of 9.8  to 15kHz my range was  9.06.
>I have noticed on the elecraft website under builder resource(after  removing
>part grrr)
>that a range of 8.8 to 18kHz is ok, can someone explain these values,
>oh by the way I have cut out and destroyed in the process the 10uh  choke so
>I have to
>wait for replacement, comments on cutting out parts before replacements  
>arrive
>would not be helpfull at this stage i know im a fool hi.
>The big question is did I need to worry in the first place
>looking forward to replys.
>
>Mick  M1MGD>
>
>
>_______________________________________________
>Elecraft mailing list
>Post to: [hidden email]
>You must be a subscriber to post to the list.
>Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft   
>
>Help: http://mailman.qth.net/subscribers.htm
>Elecraft web page: http://www.elecraft.com
>
>  
>

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[John, KI6WX]

Mark;
I would recommend using the 12uH inductor.  I designed the K2 PLL
temperature stability mod and it is my recommendation that you not have an
oscillator reference range below 9.8kHz for the most effective performance
of that circuit.
-John
 KI6WX

----- Original Message -----
From: <[hidden email]>


> I'm just at the point of testing the PLL Reference Oscillator Range as
> well and am measuring 9.11 kHz.  This is low compared to the spec of 9.8
> to 15 kHz per the manual.  Before I proceed to much farther, is 9.11 kHz
> okay as is?  Should I be getting a 12 uH replacement L31 as well?  What
> is the downside of leaving it as is?
>
> Mark, NK8Q
> K2 S/N 4786
>


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