Heng's VORTEX?
Anyone own both the Vortex I and Vortex II, or have laid hands on them at a campin world or some such? Near as I can tell, the II adds reverse and speed control, and almost triple the price. I'd li...
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Don't know about the vortex fan, but do use a PWM speed controllr of 21Khz or higher or the windings in the motor will likely Whine audibly, annoyingly, at anything but max speed.
