. I remember Richie B. telling me about the dramatic improvement he got when swapping his secondary for one with more turns, the sparks more than doubled in length. In Zo terms, he went from 20k to 40k.
Steve,
I thought Richie's sparks increased by about 10 or 20% when he used the greater number of turns in his spark gap coil. I was discussing those issues with him back when he did that work. I have his results written down somewhere in my notebooks. I'll have to look it up.