One way to find out, build one.
Doug
On Thu, Oct 15, 2020 at 8:31 PM jimlux <jimlux@xxxxxxxxxxxxx> wrote:
> 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.
>
> I'm not sure a flat is any better.
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