There's a problem with overheating using 60 hz power supples on 50 hz power since the effect would be an overvoltage, but not the other way around. Also, running at 60 hz increases the ability of the transformer to accommodate a larger voltage swing. The transformer is effectively uprated - runs cooler and has a higher voltage headroom to maintain VA rating.
As far as ripple, voltage change is decreased since energy delivery to the caps is faster. Running at a higher frequency should not be a problem.
As far as ripple, voltage change is decreased since energy delivery to the caps is faster. Running at a higher frequency should not be a problem.