Thanks Aablea,

I changed the SCR once I had it running at 380v so it should have been okay. My hall pickup is open circuit when no magnet is near, 0v when the magnet is nearby. I know I'll need an inverter circuit but my question is what volts/amps should you be supplying to the SCR gate to make it switch? Is it really 0.8 volts and 0.2amp max?

Thanks in advance,
Rich