[Elecraft] K2 drift

[Don Wilhelm]

Bernie,

I would first check the soldering - don't forget the thin wire leads of L33.
If that is not effective, I would order new BFO crystals, a new Q24, and 
L33 - if you cannot salvage the 1/8 watt resistor and bumper stem, order 
BFOMDKT instead of L33.
I would suggest replacing all of them to shorten the troubleshooting 
work unless you are dead set on discovering the exact source of the 
problem, which could take a substantial amount of time.

In rare cases, a capacitor could be changing value, so give thought to 
also ordering a replacement C173, C174 and C169 unless you have a well 
stocked junkbox.

73,
Don W3FPR

On 4/12/2015 5:25 PM, Bernie KF0QS wrote:
> Don:
>
> Would you suggest I replace Q24, or should I just check the solder?
>
> Thanks for the help.
>
> Bernie
>
> At 05:41 AM 4/12/2015, you wrote:
>> Bernie, Since the pitch changed that says the BFO is the problem
>> (not the VFO).   I repaired one recently where Q24 was the real
>> culprit causing the BFO to shift frequency. 73, Don W3FPR On
>> 4/12/2015 2:15 AM, Bernie KF0QS wrote:
>>> Don: > > When I switch to a filter, I can't hear the signal I had
>> centered in > the passband.  I can only hear the signal if I tune
>> about 1 khz down, > and then I do hear the signal, albeit very low
>> in pitch as opposed to > the pitch I heard before I switched in the
>> filter. > > Given that, I suppose it sounds like the VFO is the problem? > >
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