Quote:
Originally Posted by alexiskai
Fun Projects used to build a D'Arsonval ammeter for the Model T, seems like that would be the place to start if you wanted to build one for the A.
Interestingly, he says that you should install a 25A fuse to protect the ammeter from high amperages and that you shouldn't use it with an alternator. I don't know that the question of how high amperage affects the ammeter has come up in the generator v. alternator debate here or the starter fuse debate.
http://www.funprojects.com/products/5016.aspx
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There are those who have said the "shunt" in the ammeter (the D'arsonval movement is VERY sensitive) acts as the fuse in the event of a short circuit.
So if you see a blue flash in your ammeter and then nothing works, you know where your problem is. Well, the system protection, anyway.
Joe K