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The fusion point of pure silica is 1,760 176;C (3,200 176;F), however the sands used have a lower melting point due to impurities. For high melting point casting, such as steels, a minimum of 98% pure silica sand must be used; however for lower melting point metals, such as cast iron and non ferrous metals, a lower purity sand can be used (between

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A Royer oscillator with 2 IRF540 N Channel mosfets, a 0.47uF Capacitor and a 1500uH inductor used for a simple DIY induction heater. The mosfets remain cool, even with such small heatsinks. An isolation transformer was used for the first test with a work coil of 20turns, then the transformer was removed and a work coil of 7+7 turns connected directly to the oscillator.

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Simple DIY Induction heater PocketMagic

A Royer oscillator with 2 IRF540 N Channel mosfets, a 0.47uF Capacitor and a 1500uH inductor used for a simple DIY induction heater. The mosfets remain cool, even with such small heatsinks. An isolation transformer was used for the first test with a work coil of 20turns, then the transformer was removed and a work coil of 7+7 turns connected directly to the oscillator.

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