Not my thread, hijack away!
Yeah, I figured that you (and Bill) were thinking of the general case of speed control. I don't expect everyone to keep track of the the details of every thread, hence my pointing out control was the overriding goal. Never meant to sound harsh or dismissive. I agree completely, PWM isn't for the noise freaks.
To continue farther afield...since the fan motor has some inductance, once you add your capacitor on the output, all you need to add is a freewheeling diode to make a crude switchmode supply.
