[Elecraft] K2 PLL Range

[Jessie Oberreuter]

      I had this problem when I was first building my K2 a few years back. 
I was scratching my head for hours.  Finally put a logic analyzer on the 
bus and found the problem: I believe it was the RIT control -- every time 
a change was detected, the MPU would snap the VFO back.  For some reason, 
mine was a little scratchy or was otherwise wandering around by +/- 1 and 
it was enough.  I fiddled with it a bit and everything was fine.  I meant 
to make sure I didn't miss a step in the manual saying to rail the 
control, and/or post this experience to the reflector, but I don't think I 
ever did.


On Wed, 10 Nov 2004, John Heaviside wrote:

> PLL Reference Oscillator Range Test (page 57 of manual).
> The 4 MHz osc has been calibrated to an external counter with known accurate reference.
> In CAL FCTR the counter reads 12099.15 MHZ
> Tap BAND+ there is no change to this reading.
> Tap BAND- the reading briefly changes to 12079.?? (too fleeting to read decimals) and instantly reverts to 12099.15.