[Elecraft] K2 drift

[Bernie and Cheryl]

Dear Frank and Don:

My K2 serial number is 6922.

With regard to Don's suggestion about improper filter setup, I have 
redone the filters several times, always following the instructions 
on Don's website.  Always, I come out of that with the filters 
working properly, and only after a long time, I find I have to adjust 
the RIT in order to get the signal within the filter's bandpass.

Since my serial number is above 3000, then that means that I have the 
new BFO inductor and the Temperature
Compensated PLL Don refers to.  Thus, I wonder if it is a bad solder 
connection.

Where would I look for the bad solder connection?  And also, is that 
the possible cause of my periodic need to readjust the filter settings?

Thanks and 73 de Bernie, KF0QS


At 10:34 AM 4/11/2015, Frank Krozel wrote:
>Bernie,
>What is your serial number?
>
>Frank KG9H
>
> > On Apr 11, 2015, at 11:13 AM, Bernie KF0QS <hamdan at ix.netcom.com> wrote:
> >
> > Dear OM's and YL's:
> >
> > Twice, I've had people tell me my K2 (which I've had on the air for over 3
> > years) drifts a bit in frequency.  Both times have occurred during long
> > QSO's so it appears to be a slight drift.
> >
> > This phenomenon may also explain something else that happens.  Whenever I
> > set up the filter settings, they work well for a while.  After a while, the
> > sweet spot (i.e., the point at which the heard signal is in the middle of
> > the filter bandpass) seems to migrate eventually to about 1khz below
> > wherever I set it (at least that's where I have to move the RIT to hear the
> > signal when I switch in the filters).
> >
> > Is there a common fix for both these problems, or am I experiencing two
> > different things.  Any help you can give would be appreciated.
> >
> > 73 de Bernie, KF0QS
> >
> >
> >
> > --
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