Originally posted by g1
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EDIT: I should have also said Hammond gives the primary voltage as 240v on that data sheet, so anything lower than that will lower your voltage. So if you measure only 220 volts, then that translates to only 313 VAC out of the secondary. That will account for your low voltage, 47 volts AC lower than spec. This gives ~60 volts DC lower when rectified.
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