I am trying to mod. a permanent split-capacitor motor so I can have variable speed control. my friend suggested that I could probably try using a junction box and PWM light-dimmer switch, but I don't really know how the motor would like that. This is a 3.5 Amp rated motor used in a squirrel cage type blower. I know that there are specialized Variable Frequency Drives used in HVAC, but don't want to spend that kind of money. Does anyone know of a way I can add a cheap (less than $30 USD) control system? If i could get two or even three speed settings I would be golden.