Re: [TCML] New high voltage source for VTTC

[Liviu Vasiliu <teslina@xxxxxxxxx>]

3.8 kV
1.1-1.3 A in CW mode.

teslina
>
>




--- On Tue, 2/10/09, DC Cox <resonance@xxxxxxxxxxxx> wrote:

> From: DC Cox <resonance@xxxxxxxxxxxx>
> Subject: Re: [TCML] New high voltage source for VTTC
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Date: Tuesday, February 10, 2009, 11:01 PM
> What are the ratings for the GU5B tube?   Plate voltage DC
> and current
> (max)?
> 
> Dr. Resonance
> 
> 
> 
> 
> On Tue, Feb 10, 2009 at 7:49 AM, Liviu Vasiliu
> <teslina@xxxxxxxxx> wrote:
> 
> > Dr Resonance
> >
> > The pole pig xfrms are just a dream for me...Anyway,
> thanx for the idea.
> >
> > teslina
> > >
> > >
> >
> >
> > --- On Tue, 2/10/09, DC Cox
> <resonance@xxxxxxxxxxxx> wrote:
> >
> > > From: DC Cox <resonance@xxxxxxxxxxxx>
> > > Subject: Re: [TCML] New high voltage source for
> VTTC
> > > To: "Tesla Coil Mailing List"
> <tesla@xxxxxxxxxx>
> > > Date: Tuesday, February 10, 2009, 12:35 AM
> > > I unwind pole xmfrs to get down to 5 kV to drive
> 833Cs.
> > >
> > > You could do the same.  By unwinding the outer
> sec layer
> > > you can set your
> > > voltage to anything you require in the 4 to 14.4
> kV range.
> > > I use the
> > > smaller
> > > 7,200 Volt pole xmfrs as then only 3-4 outer
> layers have to
> > > be removed to
> > > get to the 5 kV ACrms output required.
> > >
> > > I recase them in a steel box 18 x 18 x 17.5
> (high) inches
> > > and then use a
> > > phenolic top for the 220V input and HV output. 
> In this
> > > smaller box the
> > > weight
> > > goes from the stock pole xmfr weight of 285 lbs
> down to 110
> > > lbs.  Nice
> > > compact unit that can deliver up to 20 kVA on
> shorter duty
> > > cycles.
> > >
> > > Dr. Resonance
> > >
> > >
> > >
> > >
> > >
> > > On Sun, Feb 8, 2009 at 9:55 PM, alfred
> > > <alfred@xxxxxxxxx> wrote:
> > >
> > > > Hi list
> > > >
> > > > I am slowly building a new VTTC with a big
> russian
> > > tube (GU5B) and I needed
> > > > a more powerful high voltage transformer to
> power it.
> > > Unfortunately I have
> > > > only small MOTs with different outputs, so
> it would be
> > > hard to simply
> > > > parallel them.
> > > >
> > > > So, I designed a powersource, using the MOTs
> I have in
> > > hand. The doubler
> > > > cap will charge at the higher voltage from
> the biggest
> > > MOT and the currents
> > > > will add to another through some
> unidirectional paths
> > > (using HV diodes). I
> > > > tryed the new source with one of my VTTCs
> and the
> > > results seem to be
> > > > satisfactory.
> > > >
> > > > The design discussion, drawings, setup pics
> and movies
> > > are published here:
> > > >
> > > >
> > >
> http://4hv.org/e107_plugins/forum/forum_viewtopic.php?60496
> > > >
> > > > The suggestion from the forum guys was
> simply parallel
> > > the MOTs, because
> > > > the power dissipation from the leaking
> current would
> > > be too small to
> > > > consider, but I was worry to not loose power
> (the
> > > output difference from the
> > > > MOT secondaries was 92 V at full mains
> voltage = 220
> > > V). Another variant was
> > > > to take off the shunts and modify the number
> of turns
> > > in the MOT primaries,
> > > > but I was too afraid to not damage the xfrms
> (it is
> > > hard to get them here).
> > > > So, maibe I have chosen the complicated way,
> but still
> > > it seems to work.
> > > >
> > > > teslina
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
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> >
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