10D PC terminal voltage capacity?
Don't presume a studio flash unit has a higher trigger voltage--or that a small flash unit doesn't.
The more recently designed studio flash units do have low sync voltages to accomodate the modern electronic cameras, but always check with the manufacturer to be sure (Canon, at 6 volts, is only half the actual ISO standard--even though Canon was head of the committee that set the standard).
'There's nothing worse than a brilliant image of a fuzzy concept.' --Ansel Adams