Re: [TCML] New high voltage source for VTTC- update

[Liviu Vasiliu <teslina@xxxxxxxxx>]

Hi bartb

No, that MOT is the VTTC's MOT. It was disconnected during the tests with the new source. The base stage of the vttc (that MOT and its doubler) was left out of the new circuit.

teslina
>
>

--- On Sun, 2/15/09, bartb <bartb@xxxxxxxxxxxxxxxx> wrote:

> From: bartb <bartb@xxxxxxxxxxxxxxxx>
> Subject: Re: [TCML] New high voltage source for VTTC- update
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Date: Sunday, February 15, 2009, 8:54 PM
> Hi Liviu,
> 
> Great work! I've been to 4hv forum watching progress on
> your coil the 
> last few weeks. I'm curious about the MOT on the tube
> rack at the bottom 
> left: Are you using this for ballast along with the light?
> Just curious.
> 
> Regards,
> Bart
> 
> Liviu Vasiliu wrote:
> > Hi list
> >
> > Well...I have a guess, that my MOTs are weaker than I
> thought, so I measured the core section of each transformer.
> They are identical 3.5 cm x 6.7 cm, so a cross section of
> the core = 23.45 square centimeters, thats mean 549.9 watts
> each, so just a merely 1099 watts output with the two
> paralleled transformers.
> >
> > So, I upgraded it with two new MOTs (they are
> completely different kinds):
> > - one with 3.5 cm x 6 cm core (21 square cm core
> section ) P = 441 watts
> > - another with 3.3 cm x 7 cm (23.1 square cm core
> section) P = 533.61 watts
> >
> > Adding the two transformer in my setup would rise the
> max output power to a 2074 watts power capability. Had to
> add a new stage on the source.
> >
> > The final result:
> >
> >
> http://img23.imageshack.us/img23/8369/nouasursa0qr1.jpg
> >
> > Schema is here:
> >
> >
> http://img23.imageshack.us/img23/1536/nouasursa3hh4.jpg
> >
> > The new source with a GU81 vttc together:
> >
> >
> http://img23.imageshack.us/img23/8837/nouasursa1ki9.jpg
> >
> > The diodes are 22 kV @ 3 A each, doubler cap = 5
> microF @ 2.5 kV
> > Filter cap = 10 nF @ 20 kV - not figured in the schema
> ( I made it 10 times more than the primary cap as Dr Spark
> suggested in his posts, now I am runing a primary cap = 714
> pF)
> >
> > Dr Kilovolt from 4 hv forum pointed me that the MOTs
> run with nearly 2x the magnetic flux in the core so they can
> put out more power with the same copper heating, so maibe I
> can output more power than calculated. If so, I am very
> pleased. Another way to support that point is that my 2 kW
> variac heats a lot, so maibe I have more power in the
> circuit.
> >
> > Anyway, the results on the spark are great:
> >
> >
> http://www.youtube.com/watch?v=IAF-TmXxrkU&feature=channel_page
> >
> > I run the same voltage on the doubler, but with higher
> current capability. The little movie shows very well how
> important is the power input for the vttc to get out a good
> spark. So not only the tube is important but the transformer
> you are using.
> >
> > I can start now the construction of the new vttc.
> >
> > teslina
> >
> >
> >
> >
> >
> >       
> > _______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxxxxxx
> > http://www.pupman.com/mailman/listinfo/tesla
> >
> >   
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla


      
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla