Jim,
I conclude that you do not operate much on 80 or 40 meters!
If your operation is mostly on 20 meters with only an occasional
excursion to the other bands, then there is the possibility that you may
not have noticed.
Set the K2 to 40 meters and take a look at the BFO frequency for both
USB and LSB. If my suspicions are correct, you will find them almost
the same.
If that is indeed the case, crank up Spectrogram and use a noise
generator (or dead band noise) to show you the OP1 filter passband
position, then lower the DAC value (or frequency) so the passband
response is below the IF filter center rather than above.
The BFO frequency will be in the vicinity of 4913 for LSB and 4916 for USB.
Yes, the LSB settings will be used for USB on 15, 12 and 10 meters.
73,
Don W3FPR
On 9/3/2012 5:22 PM, Jim Harris wrote:
> Hi,
> My K2 S/N 47XX is about 6-7 years old and has functioned relatively well
> since I built it. A few days ago I attempted to use it to check into a local
> 10 meter net and was told I was on lower sideband. The display indicated
> upper sideband, "U" as it should on that band. The displayed frequency was
> the usual net frequency. I changed the mode to "L" and was still unable to
> check into the net.
> My initial thought was that the last time I adjusted the CAL FIL I had setup
> on the opposite sideband although I've used the radio since with good
> success. Then I remembered the "OP1" filter is used for transmitting and is
> not adjustable so that seemed to rule out setting up on the opposite
> sideband. I"m aware there is a frequency inversion on 15 meters and above
> and have though the problem might be associated with that.
> This past weekend in the Colorado QSO party I operated portable on 20 meters
> and logged 76 Q's so that band seems to be transmitting and receiving
> properly. I've reviewed the K2 troubleshooting procedures in the manual as
> well as some on line sources and have not found anything that relates to this
> problem.
> I sure would be appreciative to anyone who can shed some light on where to
> start to resolve this issue.
>
> Take pride in the USA. 73
>
>
>
> Jim, W0EM
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