Jason Hsu wrote:

Has anyone here used a motor to control a potentiometer or variable
capacitor? (An automatic tuner would be such an application.)

What type of motor do you use? Servo? Stepper? Something else?
What do I need to look for in a motor?

Jason Hsu, AG4DG


DUAL 10K LINEAR TAPER MOTORIZED POT CAT# MPOT-10K
http://www.allelectronics.com/cgi-bin/category.cgi

4 dollars.

Also, I've used surplus 1 rpm motors to drive capacitors.
You want DC, small and slow.