[Elecraft] Off Frequency K2

[n5gf]

Looking for a helpful suggestion.   My K2 #3332 WILL NOT calibrate on =
frequency.  I have run CAL FCTR, set the 4.0000 Mhz Oscillator exactly =
on 4.0000 Mhz by using a frequency counter which has been calibrated =
against WWV to a readout of 1 Hz and by attaching the probe to TP1 and =
adjusting C22 to match the K2 readout to the counter.  I have measured =
the 4.000 Mhz crystal frequency directly on Pin 14 of U6 and adjusted it =
with the C22 padder to exactly 4.000 Mhz with this same calibrated =
frequency counter.  I have used an accurately calibrated receiver and =
zero beat the 5th harmonic of the 4.000 Mhz oscillator with the 20 Mhz =
WWV signal. =20

After each attempt at setting the reference oscillator I have run CAL =
PLL and CAL FIL, double checked all entries for bandwidth and =
frequencies of filter setting BF1 thru BF4.

I have performed each of these methods a number of times and EVERY ONE =
gives the same results.  When tuning in a signal off the air I find that =
the frequency readout is from 50 to 100 Hz LOW both on LSB and USB.  =
This means that a SSB signal on 3842.00 Khz LSB will actually tune in at =
3842.05 Khz LSB and a signal on 14200.00 Khz USB will actually tune in =
at 14200.05 Khz USB on the K2 readout.

I have tried to fudge this error out by simply adjusting the 4.000 Mhz =
ref. osc. up a little and down a little, but the error remains the same =
after the CAL functions are run.  I realize that for a CW operator, this =
is a negligible error and means nothing because it will only vary the =
pitch of the CW signal just a little on both transmit and receive, but =
for SSB operation, especially with the narrow and sharp skirted filters =
of the K2, it becomes very annoying to my ears AND to the ears of the =
stations on the other end during a roundtable ragchew where everyone =
must be on the same frequency.=20

Of course the simple solution here is to just tune so the readout reads =
50 + Hz away from the actual frequency being received and forget it.  =
But that just isn't right and this radio should calibrate much closer =
than it does.

Does anyone have a suggestion......maybe something I have missed, even =
though I've now read the books so much the print is beginning to fade =
from being illuminated to much by my beady little eyes.

As always, thanks in advance

73  de N5GF  Ed  K2 #3332  

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