[Elecraft] Help with K2 PLL Reference Oscillator Problem

Fri Mar 12 22:23:00 2004

Kenny;
This is a problem with the 12MHz crystals that Elecraft is receiving from
ECS.  The Lm of these crystals is lower than the original design called for.
To fix the problem, Elecraft will send you a 10uH L31 which will reduce your
range to the desired 10-15 kHz.  To order this part, contact
[email protected] and explain the problem.

You can continued building the K2 even with this problem.  The only
disadvantage of the large swing is that it increases the temperature drift
of the K2.  When you get the smaller value L31, just cut out the old one and
install the new one.
-John
 KI6WX

----- Original Message ----- 
From: "Kenny Richards" <[email protected]>
To: <[email protected]>
Sent: Friday, March 12, 2004 5:08 PM
Subject: [Elecraft] Help with K2 PLL Reference Oscillator Problem

> I needed some guidance as to what could be causing a ~20khz swing on
> the PLL ref oscillator.  I'm about half way through the building of a
> K2, purchased about 4 months ago.
>
> The manual states up to 13 khz swing is OK and the manual amendment
> states up to 15 khz is OK, but I'm getting almost 20 khz.  (18.58 khz
> to be exact)  My Ref High Freq is 12100.1 khz, which from the manual
> seems right on, but my Ref Low Freq is 12081.52 khz.
>
> Everything up to this point has been within spec and the frequency
> readings are solid, so I don't think there is anything heat related
> here.  Where should I start looking?  (I can't find anything in the
> trouble shooting section of the manual and searching the list archives
> hasn't uncovered anything yet)
>
> Thanks,
> Kenny, KU7M
>