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On 10/15/20 6:50 AM, Douglas Johnson wrote:
Thank you both, I think I know where to go from here on my current build.
My project is a larger bipolar than I have built to date. Secondary is 3.5"
dia. X 24" with .015 mag wire. By the time I built the primary it was 6"
long and I was getting "runners" on the secondary. I think my fix will be
going to a flat spiral primary.
On a bipolar, it's hard to control the coupling on a solenoidal primary
sliding it one way or the other doesn't change the flux distribution
very much.