Alternator re-start question

[Rick Erwin]

With two fresh D-Cell batteries in series (3.2 volts total) feeding the alternator re-start circuitry, what voltage is needed at the field connection on the alternator/s to excite the field to re-start the alternator?

I get .8-.9 (8 to 9 tenths) of a volt at the field connection. Is that enough, or is there something amiss?

Thanks,

Rick