I had a go at this on one of the didnts/chids last night, wrapped coil on a 3.2mm drill bit, about 7 turns, 3.5Ω .. its easy to shape the coil...
A guy had a metal belt buckle in his checked baggage that was the shape of half a grenade. I remember seeing it on the news headlines. .comsed...
I did see the other thread too, i think they said it doesn't matter how many holes or how long the slot, and it didn't matter where on the carto...
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