I was listening down around 14.077, just above some slow FSK mode which I think is JT65A. The JT65A was tuned quite low pitched in my receiver, and I could clearly see "images" of it over to the right. Judging by the spacing of the "image" tones I was seeing an audio third harmonic of the original signal. The image tones were clearly visible and would have been copyiable in their own right if not for the 3x spacing.
My transceiver is a K3 and the signal was just an S9 so overload or intermod are unlikely to be the issue, but to make sure the images weren't being generated this end I tuned in some strong RTTY and found no harmonic images of the signal. Has anyone else seen this? Aren't the tones supposed to be generated at such a frequency that any harmonics are cut off by the SSB filter? Julian, G4ILO
