I thought the problem I just posted was interesting but did not
really matter, however I just discovered something more significant.
The MAIN and SUB VFO's can be on the same band and have a similar problem.
If the frequency is different by more than one KPA-1500 ATU segment
and you are TXing on the SUB frequency, then the ATU will switch
continuously back and forth the between the two frequencies. This
means you can't go split (TXing on the SUB) when using the ATU, by
more than 10KHz on 160M and 20KHz on 80M-12M.
- Paul KW7Y
My KPA1500 is "sniffing" the frequency that is being sent by the
TS990 to my logging program.
I was working split on 40M, TXing on the TS990 Sub Frequency
and RXing on the TS990 Main frequency. All worked well.
After the QSO I switched the TS990 Main frequency to 20M to listen
around. The Main is still selected RX and the Sub still selected for
TX. I heard the KPA1500 going click click click ..;, looked over and
saw it going back and forth between 20M and 40M; it couldn't decide
which band to be on. I would have expected the KP1500 to go to the TX
band and stay there.
I will try turning off the logging program, add a wire to the XVR
connector for TXD, and set the KP1500 to poll the TS990 and see what
happens then.
- Paul
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