[Elecraft] K2 Tuning 'glitches' every 5 Khz

[Bob Patten]

Ron D'Eau Claire wrote:

>How's the tuning range of the PLL Reference Oscillator? 
>
>Instructions for checking the PLL Reference oscillator tuning - and for
>making adjustments to get the range right - are in your original
>assembly manual under "Alignment and Test - Part II" That's on Page 57
>of my (Rev C) version of the manual. You want to do "PLL Reference
>Oscillator Range Test" and "VCO Alignment". Note: SKIP the 4 MHz
>
>It's possible that you have a "bad" crystal that doesn't have adequate
>tuning range. Contact Elecraft if the tests you run according to the
>above instructions do not provide you with  the frequency range needed.
>
Noticed that my VFO was doing some strange freq shifts during the FYBO 
this weekend - first time
I've really used it since doing the BFO stability mod.  In doing the PLL 
Reference Oscillator Test, I find
that the range has gone from its original 15kHz to only 11.3kHz.  The 
manual says it should shift a minimum
of 12kHz.  I listened to the receiver some more and determined that it 
is doing a frequency jump every
5kHz  -  7006.12, 7011.12, 7.016.12, etc.    Do I need a new xtal?

Oh the VCO voltages had changed very slightly from the original, but 
still well within the ballpark.

-- 
73,     Bob Patten, N4BP                Plantation, FL

E-Mail: n4bp@arrl.net                   Website: http://www.qsl.net/n4bp
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