Re: Gen 4 Larger coil <assistance please>

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

Original poster: "S & J Young by way of Terry Fritz <teslalist-at-qwest-dot-net>" <youngs-at-konnections-dot-net>



Glenn,

Before you strip off windings, consider adding more inductance to the
primary so your MMC capacitance can be smaller.  You can 1) add more turns
to your spiral, 2) add a second spiral above or below the first one with
plastic insulation between the two pancakes, or 3) add some external
off-axis inductance.  All have been discussed much and are in the archives.
2) has the added benefit of more inductance resulting from the mutual
inductance of the two windings.
--Steve
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, January 13, 2003 8:22 AM
Subject: Gen 4 Larger coil <assistance please>


 >
 > Original poster: "Glenn by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<gcerny-at-comcast-dot-net>
 >
 > Hello all,
 > I wound a 15.5 dia piece of C-900 with Formvar 16 AWG
 > to a length of 61 inches a while back.  Now it seems that
 > may be too long of a wind.  The number I crunch say about
 > 50kc resonance and that computed to an un-affordable
 > MMC (400+ caps).
 > Would someone be kind enough to check my math before
 > I strip 15-20 inches of this epoxy coated coil wire off to get
 > the resonance up to a reasonable number?  Thanks.
 > Other particulars are Pole Power 14400-at-1A.  ASRG with 12
 > points variable speed to 5,000 rpm.  Vaccuum static gap.
 > Primary flat spiral copper tube.
 > This project has been "on the shelf" while I built another house
 > and now I'm back and ready to finish it.  Some photos will be
 > posted on my url soon  Nothin' fancy.  html ain't my bag  :-)
 > Sure appreciate it.
 > Glenn
 >
 >
 >