If I have a different length on the case of the tuner compared to the
length on the hot terminal, how does that moderate impedance?


Assuming you're speaking of a resonant dipole or verticle, it would
seem to me that by doing that you are moving the feedpoint away from the 50
ohm (70 ohm?) feedpoint at the center.... and probably towards a higher
impedance feedpoint. Not sure what effect that would have on those
autotuners, but perhaps they work better with a bit higher impedance than
50 ohms?




Ed K7AAT