I have been battling a problem with my sideband adapter for the K2. The
receive audio on both sidebands (upper is much worse than lower) sounds
very thin. When a station is not tuned, the received static has a tiny
shrill quality. I used spectrogram to align the filters and the
curves produced very closely resemble those depicted in N0SS
instructions. Yes, I have checked that the BFO settings are appropriate
to the lowest pitch of the BFO range. I have redone the alignments
several times and still get the same result. Compared to my other rigs,
the K2 is much thinner and is reminiscent of an old 6 transistor radio
compared to a boom box. Even with an external speaker (A Collins
312B-3) the sound is objectionable. I aligned the CW filters in the
same way and they work normally. It is fair to say that I have never
been happy with the sound on sideband. I have checked the SSB adapter
board for assembly errors, but have found none. It is clear that I am
either making a systematic error in the alignment procedure, or there
is something wrong with the adapter. Any and all thoughts would be
appreciated.
Fred Bongard
WB6JLL
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