15 Volts in a '67

[bradoc1]

Can anyone tell me if I have an electrical
problem here?
I've got a '67 convertible, and the regulator
generally kicks out 14 to 15 volts. The car
runs fine, and all the electrical stuff
works, but I just got a Whistler AC inverter
that automatically cuts out when the input
rises over 15V. So it keeps reseting on me;
what a pain.

So I figure the regulator is screwed up,
but then I thought maybe that's just the
way they work?

Does anyone know what voltage I should
see out of a properly functioning regulator?

Thanks,
Brad

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'67 289 converible