[TowerTalk] Ham IV question

[john.brewer@us.schneider-electric.com]

How accurate should the control box indication be on a  Ham IV.  I've noticed recently that
what should be a 90 degree turn when viewed on the meter of the control box, appears to be
about 125 deg on the tower.

As I recall, all that's in the rotor is an exposed potentiometer .... and I can't figure out
how that could cause what I see. Anyone else notice a similar thing? How linear are these
indicators?

Thanks everyone,
John K5MO