[Elecraft] K2 Frequency Stability

[Ron D' Eau Claire]

> I would not be surprised if all K2s have a slow drift rate of
> from 130Hz to
> 170Hz over a period of 8 to 12 hours with an ambient temperature
> of 60 to 68
> degrees F.  This drift is considerably greater than most of the
> late model
> commercial American and Japanese made transceivers.

If someone is seeing this much drift, they have a problem with their K2 that
would best be addressed to the Elecraft support people.

Yes, it is possible to shift the BFO frequency slightly by pressing on the
bottom of the K2. Personally, I don't usually squeeze my K2 while operating.
I save that for the Charmin. (Oops... age showing.)

Elecraft specs call for "< 100 Hz from cold start typical at 25C". When I
first built my K2, I did a few runs on the stability, using WWV as a
reference. From a COLD start I noted about 20 Hz drift, during the first
hour. I don't see that I checked it past about 4 hours when the total drift
from a cold start was still less than 30 Hz.

The issue of stability came up a year or so ago here on the reflector. I
didn't keep any notes from the other's experiences, but I don't recall that
my K2 was unusually stable among all of those who contributed to that
thread.

Ron AC7AC
K2 # 1289