[Elecraft] K2 PLL Oscillator Range Test failure (barely)

[John, KI6WX]

Scott;
You definitely want the PLL reference to tune at least 9.8 kHz so you don't
compromise the performance on 160 meters.  If L31 is 10uH, going to 12uH
will cure the problem without causing any bad side effects.  You can ask
Elecraft to send you the different value inductor.

The narrow and wide tuning ranges that sometimes occur on the PLL reference
are due to variations in the Q of the 12 MHz crystal.  This is not always
easy to control.  Elecraft has implemented a tighter spec with the crystal
vendor so this problem is less than it was in the past.
-John
 KI6WX


> On page 60 of the K2 manual the PLL Reference Oscillator Range Test
> asks for the Ref. High Freq. and Ref. Low Freq. measurements. I have
>
> HI = 12099.67
> LO = 12090.50
> DIFF 9.17
>
> which is less than the 9.8 to 15 kHz required by the manual.
> Everything else looks good. Any ideas? Any help would be
> appreciated. Thanks.
>