[Sean]

C44 is a 60uF non-polarized electrolytic mounted on the front side of the motor. Look at the under chassis view on page 3 of the schematic:

http://www.nostalgiaair.org/PagesByModel...015505.pdf

You might be able to do some rewiring to replace the tone switch with a potentiometer but I would try to get a switch before going through that trouble.