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 - A Lifetime of David Brown - by Samuel Kennedy. I was born in 1950 and reared on my family�s 100 acre farm. It was a fairly typical Northern Ireland farm where the main enterprise was dairying but some pigs, poultry and sheep were also kept. Potatoes were grown for sale and oats were grown to be used for cattle and horse feeding. Up to about 1958 the dairy cows were fed hay with some turnips and after that grass silage was the main winter feed. That same year was the last in which flax was grown on the farm. Flax provided the fibre which w
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