[Elecraft] K2 drift

[Matt VK2RQ]

You say it is shifting by as much as 1kHz? That is definitely not normal. My K2 built last year will only drift by around 20Hz or so as it warms up, it is pretty stable.

The BFO inductor is L33, the pre-wound one that sits on a rubber bumper. Wasn't there a thread some time last year where someone was having problems with BFO frequency stability, and it turned out there was some contaminant on the rubber bumper that was making it conductive?

73, Matt VK2RQ

> On 12 Apr 2015, at 1:13 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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