On Jan 15, 12:15*am, Bill Noble wrote:
...
it's amazing how much just plain wrong information you are getting.

Vfd on a silicon diode is .7v. *Fullwave rectifiers have two in the
forward path conducting on each half wave. *1.4V drop. *If you pull 12
amps, power is therefore 16 watts. *But, it is AC, so you won't pull the
12 amps continually.

Yes, from YOU.

The forward voltage isn't one value, it varies as the log of the
current, which you should know if you ever curve-traced
semiconductors. The Measured drop across a power rectifier near its
rated load is 1 - 2V as others have posted. Some of that is Vf, some
is IR drop, some possibly corrosion on the hardware, but the heatsink
has to remove it anyway.

I'd plan for a fan to use if needed, like for a larger motor.

jsw