If you use a normal crappy autotransformer from the hardware store, it will
probably be fine. However, the projector motor will run 20% slower. This
means your 24 fps setting will not be 24 fps but it also means the motor
will run hotter and the cooling fan will not move as much air past the
lamp. So if you do this, I would use a smaller lamp size.
It's easy to change voltage, it's very hard to change operating frequency.
If these are Kodak Analyst projectors there are some belt changes that will
make them operate properly on 50 Hz. If they are Specos there are some pulley
replacements. Check the projector manual.
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