Peter,

On Tue, 14 Feb 2006 22:32:48 -0500, Peter Todd wrote:
>...
> I built a linear power supply using a 28A
> 6.3V transformer from digikey. 237-1255-ND. 4x LM396K 10A regulators in
> parallel through load-sharing resistors regulate the voltage. For my
> first attempt I used a standard 50A 600V diode bridge, MP506W-BPMS-ND

You haven't mentioned capacitors - hopefully you have some huge electrolytics across the output of the 
bridge-rectifier?

>...

> I ordered three 115CNQ015ASL-ND 15V 110A

15V doesn't sound like much headroom above the supply - the 6.3V is RMS, so you'll be getting peaks of about 
9V.  Added to that, the 6.3V is what it will give when fully loaded - at lower loads the voltage will rise.  
Without detailed specs I don't know how high that would be, but it *could* be enough to exceed the diodes' 
reverse voltage rating when the motors all happen to go quiet together.

Cheers,


Howard Winter
St.Albans, England


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