Posted by Kentb of SWMO on May 06, 2008 at 05:54:52 from (98.20.114.174):
In Reply to: battery question posted by farm M on May 05, 2008 at 19:51:31:
Allis-Chalmers used positive ground on even their 12 volt systems until they started using alternators. There is one over the road truck builder who the last I knew STILL uses positive ground. Mack I think. big truck alternators DO NOT connect the negative side of the diode pask to the case. It is connected to a NEGATIVE post. This way the alternator can be used with both a Negative Ground system or a Positive Ground system. As said most electronics like negative grounds because the NPN junction transistor is more common, But transistors with a PNP junction are sais to switch faster.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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