Re: flat strip primary

To: tesla-at-pupman-dot-com
Subject: Re: flat strip primary
From: "Samuel Rosset" <samr-at-chez-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Fri, 07 May 1999 01:27:32 -0600
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme



>Original Poster: bob golding <yubba-at-clara-dot-net>
>
>Hi all,
> i just got a load of 20 mm x 1 mm(3/4" x .06") flat  copper strip from the
>local scrap yard. I think is used for lightning conductors. I am thinking
>of making a flat strip primary with some of it. Does anyone have any
>experience of doing this?. What i need to know is how much spacing I will
>need between turns. I am thinking of using some 1 mm poly between the
>turns, but how many layers do i need. I am using a 9 kv transformer rated
>at 60 mA. Should I use the same rule of thumb as with caps and assume 300
>volts per mil. How do I work out the equivalent dimensions to round section
>to plug in to win Tesla?. This is not to much of a problem  for me as I
>have a bridge, but It would be helpful. So many questions not enough time.
>
>many thanks
>
>bob golding


If I'm right, you want to use your strip your your PRIMARY right???
Well, you don't need to worry about the spacing between turns. Electricity
wont jump from one to another, because the difference of potential between
turns is very low (copper is a good conductor). A primary is not a cap.
between the plates of your cap, you have a difference of potential of 9KV
(even more in fact), that's why you have to be concern about distance
between the plates.
So you don't have to worry about electricity jumping between turns.
Nevertheless, spacing is important, for it will determine the inductance
(and therefore frequency) of your primary. Use Ed Sonderman's spread sheet
to design the "perfect" primary for your secondary...

I hope It will help...

Sam