Alfard, check to see if the 7600GR will step tune in 1KHz steps. My old
7600 (no GR) would only step tune in 5 KHz icrements. That would cause
missing some narrow SSB signals, because it would step right across
some of the stations and you might never know they were there. Anyway
that's why some folks are saying the tuning increments are large.

The infinitely precise fine tuning wheel only moves you along about 2
or 3 KHz total and then it stops rotating, so you can't scan a large
segment of a band with it. But not to worry if the radio SSB band
segments have 1KHz step tunning.