Re: Primary/Secondary Size relationship

["S.Gaeta" <SGTPORKY-at-prodigy-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Hi ???,
I had to do something similar when I wound a new 5.5" secondary and just had
to try it out before winding a proper primary for it. I borrowed the primary
from my 4.5" diameter coil. It had an inner diameter of 5.5". The trick is
to decrease the coupling by jacking up the secondary as you have stated. I
finally ended up using a 2" thick roll of Kapton tape which has an HDPE core
and had no problem whatsoever. I had to disassemble the set up after I was
done testing because the secondary was extreamly 'tipsey', and knowing my
luck.......

Hope this helps.

Sue
sgtporky-at-prodigy-dot-net

----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, July 14, 2000 10:01 AM
Subject: Primary/Secondary Size relationship


> Original poster: Irrelative-at-aol-dot-com
>
> When creating the primary of a tesla coil, does the secondary have to fit
> inside the primary or can it "hover" above it.  For example, if you have a
4"
> PVC, but the inside diameter of your primary is 3", can you still use them
so
> long as the secondary is high enough away to prevent sparks from jumping?
> Ok, so maybe this question is seeming less hypothetical as you read it,
but I
> just want to see if I need to get a larger primary or not.  Thanks to all
the
> experts who keep us informed!
>
>
>