new coil/rotary spark gap

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Original poster: motosk8er2@xxxxxxx 


Hello all,
After a long time i have decided to build another coil, it has a 4 
inch by 4 foot secondary and the primary isnt made yet. I have stuck 
with static spark gaps but i want more power and have decided to go 
with a rotary spark gap. I have tried 3 times but i dont have the 
materials needed for a good quality set up. Does anyone have one 
laying around they would be interested in selling, or making me one? 
Also would a flat primary be better or would a cone shaped one. I am 
farely new and only built a few coils so any help is greatly 
appreciated, thanks Andrew