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A few questions about induction heaters. Answered

1) What voltage do they use? Would 12v, 110v, or 1kv work best?

2) Would simply directing the power into the heating coil work? Or do they need supporting circuitry?

3) What frequency should be used? Will low frequency AC such as 60 hz work, or will I need to step it up into the khz range?

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High current so low voltage is going to be safer with a bare copper coil to play with.

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