Re: BIG VTTC project

["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 could easily obtain all four of your 7.5 volt, 21 amp, filiment
requirements from a rewound pole xmfr.  Keep the 220 volt primary on and cut
off the HV winding.  They wind on 4 separate filiment windings.  We found it
works out to approx 1 volt per turn, but do a 10 turn test to make sure.

You can use this technique to produce a xmfr to provide filiment currents up
to 60 Amperes from any standard pole xmfr core with primary (240 VAC)
winding left on and stripping off the HV winding.

Dr. Resonance




----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Thursday, January 02, 2003 12:00 AM
Subject: Re: BIG VTTC project


 > Original poster: "Steven Ward by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<srward16-at-hotmail-dot-com>
 >
 > Hi Greg,
 >
 > A quick look up on the 4-1000A tube shows a max plate of 6kv at 600ma, i
 > believe.  Hmm, even for just one, how do you suppose you will supply these
 > big tubes?  And how many so you suppose that you would use?  I bet a pair
 > would make one heck of a coil!  Sorry i dont have much tech stuff to
offer.
 > But i do offer my support!  I would really be interested in seeing a coil
 > of that power being built.  Im working on a dual 833A coil.  But im still
 > learning.  Im sure that someone would know the feasability of using
 > 4-1000A's as a VTTC tube.  IT seems like it would work.  7.5v 21A
 > filaments, oughhh, thats a big transformer!  And im sure your plate supply
 > will also be a back breaker!  and a circuit breaker :)
 >
 > Good luck!
 >
 > Steve Ward.
 >
 >
 >
 >
 >
 >
 > >From: "Tesla list" <tesla-at-pupman-dot-com>
 > >To: tesla-at-pupman-dot-com
 > >Subject: BIG VTTC project
 > >Date: Wed, 01 Jan 2003 20:22:43 -0700
 > >
 > >Original poster: "Gregory Peters by way of Terry Fritz
 > ><teslalist-at-qwest-dot-net>" <s371034-at-student.uq.edu.au>
 > >
 > >Hello all,
 > >
 > >I can get some near new 4-1000 valves pretty cheaply. These are a 3kW
 > >rated transmitting tetrode. How would these go in a VTTC? What
 > >configuration should I use (should I wire the screen and grid
 > >together and use as a triode)?
 > >
 > >Cheers,
 > >
 > >Greg.
 >
 >
 > _
 >
 >