I have a 120 volt, 60 Hz Paragon SC-2 kiln.

You can rewire your 120-volt kiln to fire on 240 volts, 50 Hz without having to use a voltage converter. The two heating elements in your 120-volt kiln are wired in parallel. You will need to rewire them in series. The 120-volt kiln, which will then be wired for 240 volts, can also fire on 220 volts. You will also need a different cord set.