I have repaired and installed alternators for YEARS on ag and industrial equipment.
I use the 1N5408 diodes 'cause they are about BULLETPROOF. They are rated3 Amps @ 1000 PIV., which is WAY overkill for this application, but I don't see any failures with them. They cost so little to buy, for me it's not worth using lesser-rated units.
Some guys use diodes of much lesser ratings, but SEEM to get by with them, as low as 50 PIV. HOWEVER, when the ignition is switched off, and the magnetic fields in the ignition coil and alternator rotor collapse, the diode gets zapped with a pretty good spike of electricity.
Are you in Minnesota? If you need a diode, I'd stuff one in an envelope, and drop it in the mail to you, and you probably have it in one or to days.
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Today's Featured Article - Usin Your Implements: Bucket Loader - by Curtis Von Fange. Introduction: Dad was raised during the depression years of the thirties. As a kid he worked part time on a farm in Kansas doing many of the manual chores. Some of the more successful farmers of that day had a new time saving device called a tractor. It increased the farm productivity and, in general, made life easier because more work could be done with this 'mechanical beast'. My dad dreamed that some day he would have his own tractor with every implement he could get. When he rea
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