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Reply to "Still can't get my alternator to charge battery"

I replaced the alternator with the exact same type. It has the internal voltage regulator as opposed to the external. This is what was on the car and working when I bought it. Two wires only to the alternator.
I have to believe the internal regulator is not increasing the voltage when it sees the increased demand on the battery. I plan to take it to a local alternator shop and have them full test it, not just bench test it where it shows the basic voltage at idle.
Thanks.
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