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[TCML] 810 tube coil

Hello everyone - I have completed my first tube coil using a 810 triode based on Steve ward's 810 coil outlined here,
I've almost exactly copied his design but with mica transmitting caps.
I've been working with trying to tune primary turns and adjusting grid coil height and turns and have been getting ~4" sparks from the breakout point, I would have expected more. I'm not using a staccato yet but how much should I expect from a coil like this at 60Hz?

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