On Jul 13, 7:12 am, msg wrote:
Please view these photos of a three-turn planetary drive
pot that uses a conventional "stackpot" formfactor athttp://www.cybertheque.org/homebrew/rcvr/images/antennas/pot.jpg
Resistance = 1K

Interesting. I've never seen a pot like this.

So the turns ratio is determined by the shaft diameter to ball
diameter ratio?
And the wiper arm is connected to the ball carrier?
So this assumes the metal to metal, shaft to ball won't slip, but the
ball will turn in the carrier, causing the carrier to have 1/3 the
rotation of the shaft?

Sorry, this doesn't help you at all...
Alan Nishioka