[Elecraft] Sideband reversal

[Ferguson, Kevin]

The Swan-350 (and possibly other swan rigs) reversed sidebands between upper
and lower bands.  It was an analog rig, so there were backward scales on the
dial for the reversed bands. In fact I think this is how the convention of
using LSB below 20m, and USB for 20m and up got started.  At least the K2
straightens out the tuning in software, so that clockwise movement of the
knob always increases the tuned frequency (though it may actually be either
raising or decreasing BFO)