[Towertalk] How do you calibrate a CDE rotor?

[Don Havlicek]

The 'calibrate' knob has a switch 'built-in'.

Push in on the calibrate knob until it clicks .. then turn the knob 
until the needle is pointing 'full-scale' [South at the right-hand end 
of the meter].

Push in again .. and the scale should be correct [+/- 5 degrees] from 
zero-scale to full-scale.

Good luck,
Don
N8DE