Delta 152 cfm 12v fan with pwm controller.JPG Shown are the Delta 152 cfm fan from Jameco, along with the pwm controller I discussed above. Looking at the fan on the black label side, the wires exiting from the motor, counter clockwise, are positive, negative and unused. Don't bother trying to deci...

So I took the fans apart and figured out from the diagrams, spec sheets etc. which wires were actually + and -. Result: the fans work as they should, and have plenty of power. For those who might want to control the fan speed, Amazon sells a 10 amp pwm controller, which I also tested, and it works f...

I just got off the phone with Jameco tech support. The Jameco fan you suggest, which has 4 wires and is specified as DC on their page, will not run on plain old Direct Current. This is unfortunate because it has a nice high CFM output. It requires a pulse width modulated speed controller, which Jame...