[Elecraft] Keying CW in SSB Mode

[Ryan Noguchi]

>Five or six times over several hours I heard stations calling me way off my frequency.  It seemed like a Khz or more, though I didn’t measure it at the time...>Is it possible that they were using CW keying on USB or LSB which resulted in a frequency offset of, typically, 600 (or, as Don suggests, 1200) Hz?


Yes, I think I experienced this last weekend. I answered a CQ on 6M SSB, then we agreed to switch to CW on the same frequency. When I switched to CW mode on my KX3, no one was there, but I saw a faint narrow signal appear off to the side on the PX3. After several seconds of waiting and debating, I had a hunch that was my op, so I QSYed to that frequency and found him, and we completed the QSO on that frequency. His filter sandwich must have been pretty wide for him to copy me, so he was probably still in SSB mode. 

Detecting off-frequency callers outside my narrow filter passband is yet another reason why I find the PX3 indispensible.

73, Ryan AI6DO