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http://www.themagnetoguys.co.uk/Using_the_Growler.php This is the best explanation I have found that explains how a growler works and should be used.

Doesnt look like this core is going to be appropriate as I am unable to wind sufficient windings or the wire winding I'm using is not of the correct gauge. I doubled up the windings with no change. Won't be as much fun or have the excitement with the element of danger but might be quicker and...

You may well be right! I have replaced the in series lamp with a 75w 105mA lamp and now have a speed control triac pcb taken from a belt sander or similar power tool. Adjustment of the dial either causes the lamp to distinguish and no coil hum or lamp lights and coil hums, not really a growl as...

Thanks, Ok tried that and the bulb (42w energy saving lamp) lights but no grrrrrrowl, as I would expect to hear!

Any ideas how to make one using stuff thats easy to hand and not buying expensive parts? In the UK so will run on 230v. This is the motor stator that I shall be using mounted on a timber base, grooves cut out ready, I have a switch but what would be needed to prevent high current draw?