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Re: Diff's between pre-'70 and '70-up alternators?
[Re: BradH]
#14001
01/05/05 03:24 PM
01/05/05 03:24 PM
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Joined: Dec 2003
Posts: 5,314 Carstairs, Alberta, Canada
dave571
master
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master
Joined: Dec 2003
Posts: 5,314
Carstairs, Alberta, Canada
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The main difference is that the early alternator, has one field wire, while the newer has 2. Some think that the newer alt actually has 2 fields, while the older only one. This is false. www.davesmopar.com/techreg.htmThe newer ones start to get into higher amperage ratings, than the older ones too.
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Re: Diff's between pre-'70 and '70-up alternators?
[Re: BradH]
#14002
01/05/05 03:38 PM
01/05/05 03:38 PM
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Joined: Jan 2003
Posts: 4,062 Fort DODGE, Ioway
origcharger
master
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master
Joined: Jan 2003
Posts: 4,062
Fort DODGE, Ioway
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The pre 70s ground one terminal of the field at the alternator. The 70s and newer do not have the one field terminal grounded as the voltage regulator provides a variable ground to control output. A 70s and newer alternator can be easily adapted to work with a pre 70s charging system by simply grounding one field terminal. So if someone is selling an alternator to work on both systems they are likely providing a short ground strap or wire with instructions.
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