Robert, Did the base K2 receive OK before you added the KPA100? - note that the KPA100 has nothing to do with the base K2 receive, but I would like to know if it worked fine at one time in the past.
The most likely thing that would cause the filter settings to fail is a failure of the BFO or a failure in the IF filter itself. My vote is on the BFO - go back to page 62 of your manual and re-do the BFO range test. If that is OK, then try to re-do the filter alignment using Spectrogram. Should you notice strange results with the filter alignment, then check all the components in the lower center portion of the schematic sheet 2 of 4 for proper soldering and proper component placement. The most probable cause of failure is a bad solder connection. First thing is to check the soldering, then re-check the soldering. When you have completed that, check the soldering! Often another pair of eyes will see something that you have overlooked numerous times - if you can find someone else to review your work, that may prove revealing. 73, Don W3FPR > -----Original Message----- > > Then, on CW I tuned in a strong signal, and because there > was lots of QRM, hit the XFIL to a narrower filter, and the > signal al shifted up a lot in frequency and almost disappeared. > It did completely disappear with a still narrower filter. Going > to SSB, there were lots of signals, but none of them were > intelligible. Checking the XFIL menu setting, they were all still > as I had set them, so this isn't a menu problem. > > I then removed the KPA100 and the XFIL problem was still > there. The next step was to see just what the filters were doing > using Spectrogram. The broadest CW filter, which I had set to > 1.6kHz, was more like 2.6 kHz (which explains the QRM). The other > filters, which I had set to 1.0, 0.6 and 0.3 kHz were also about > 30% broader and were all centered around 1.4kHz. For these > filters, changing the BFO down to a setting of 0 moved them down > only to about 750Hz and there was no way to get them down to > 600Hz. The LSB filters were similarly messed up, with really > messed up filter shapes. I adjusted them as I could. Plugging in > my antenna, CW signals were a little more readable, but not much, > and SSB was still unintelligible. > > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
