>>> Some rectifiers had a big terminal going to each of 2
plates, with a small terminal at 1 plate (the closest to the center,
IIRC)  Others had 3 plates, but the 2 large terminals actually were
together at the middle plate.
That was all I could figure. I think that every Lucas alternator I have 
looked inside of has been unique. I have frequently wondered whether they 
ever found a "standard". I have seen more kinds of regulators than I could 
document. "Let's try a different regulator." "Again."
I, too, have heard that all the regulators were interchangeable, but I have 
never seen the diagrams to show you how to hook up a 2-wire when you had 
removed a 5-wire. I have also heard that current replacements for the 
semiconductors of a Lucas alternator are suspect from the get-go, both 
regulators and rectifiers. I guess it is all part of the plot to make the 
concours crowd suffer as much as possible ;-) 
 
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