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The RF current (0-20MHz) produced by an air arc with asymmetrical (graphite-copper) electrodes was investigated for 120Vac 60Hz over a current range of 1.2Arms to 45Arms. Time resolved spectral signatures of measured RF currents showed amplitude dependence on 60 Hz arc current level, voltage polarity, electrode material, and circuit impedance. For most conditions, RF currents were measured only when...
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