[FLWSS] Need HP Power Supply Help

[Walter Dail]

All,
 I just picked up a couple of HP 6268B power supplies 40V @30a ea.
They are in the family of 6260B, 6269B P/S. They normally come wired for
230VAC.

These have option 27 which is a 208VAC (single phase) input. Either 
voltage is +/-10% input.

I want to run these on 240VAC. Does the transformer have moveable input
taps or was this a special transformer for this option? 

I'm suspecting the tap was intentionally made internal so when calibration
is performed, it is for that particular input line voltage. I haven't
been inside them yet, but was hoping for a quick answer from a knowledgable
person who has a manual or schematic to tell me what the difference is.

Thanks,
Walter K4HV