Re: 833A problem resolved, and others to be solved

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

Original poster: "Dr.Resonance by way of Terry Fritz <teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>


You need a better insulating material.  Rubber is not very good at high
frequencies.  Try polystyrene instead --- very good at RF frequencies.

Dr. Resonance




----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, January 17, 2003 7:32 AM
Subject: 833A problem resolved, and others to be solved


 > Original poster: "Steven Ward by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<srward16-at-hotmail-dot-com>
 >
 > Ok,
 >
 > I had this problem with my dual 833A tube coil, where one tube got red,
and
 > the other didnt.  So i made a tapped grid coil, this worked great.  Each
 > tube got a spread out redness on the plate at about the same power input
 > (very, very close).
 >
 > NEW PROBLEM!
 >
 > I now (now that i can crank her up) get a spark that jumps down from about
 > 4/5ths of the secondary coil, to the grid coil.  Thats not good!  I have a
 > thick rubber insulation sheet wraped around (loosely) the secondary to
 > insulate it from the primary and grid coils(or rather them from it).  But
 > it still managed to arc about 9" over a rubber surface!  Of course the
coil
 > was making some serious 20-22" sparks.  John Freau has a similar dual 833A
 > coil.  He only has a 12" tall (i think) secondary (where as mine is 17"
 > tall of a thicker wire guage) and does not have insulation, and his coil
 > makes 24" sparks, with much tighter quarters between the secondary
 > potential, and the primary and grid coils. I realise the rubber is helping
 > the arc to creep, because it can arc farther over an insulator(rather than
 > air). Without my insulation there, it arced more easily (but than again,
it
 > was a slightly different setup, i need to retest this).  So, i can only
 > propose that i raise the secondary up about 3", and loose some coupling.
 >
 > IF anyone has ant suggestions to this new problem, i would like to hear
 > them,  Thanks guys.
 >
 > Steve Ward.
 >
 >
 >