Quote:
Originally Posted by Herald1360
I believe you need to stick them in the bore of a reasonable sized solenoid, then feed the coil with an AC supply you can wind up and down slowly. A Variac feeding a suitably rated transformer will do. Wind it up, then wind it back to zero slowly.
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That'll work! But another way is to leave the solenoid energised and just slowly withdraw the tool to arms length.
If you can feel the tool vibrating in your hand whilst in the solenoid, the field is probably strong enough.