RE: primary tapped at 2 turns

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Pete Komen by way of Terry Fritz <twftesla-at-qwest-dot-net>" <pkomen-at-zianet-dot-com>

Hi Colin,

I assume that you increased the capacitance with the increased current of
the lower voltage XFMR.  My spreadsheet calculations show a 7.5kv 60ma
resonant cap to be 21 nF; a 5kv 120ma is 63 nF.  If you increased the
capacitance by a factor of three, the inductance should reduce by a factor
of 3 also.  Unfortunately, reducing the turns by half (in my arbitrary
Archimedes spiral) reduced the inductance to less than 1/3 of the original,
so that's not the answer.

Could you supply more about your coil and what else you changed when you
changed the XFMR?

Regards,

Pete Komen

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Sunday, February 17, 2002 8:55 PM
To: tesla-at-pupman-dot-com
Subject: primary tapped at 2 turns

Original poster: "colin.heath4 by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<colin.heath4-at-ntlworld-dot-com>

hi all
        i have my primary tapped at two turns now instead if 8 turns before
i was running a 7.5kv 60ma supply and i am now running 5kv 120ma
is it normal for the tap to go inwards rather than out because when i
changed
from 6kv 30ma to 7.5kv 60ma it went further out but now its two turns on
120ma
5kv
any ideas will be much appreciated
many thanks
colin heath