Re: A Tesla / Marx Coil (Really!)

["Luc" <ludev-at-videotron.ca> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Hi all

That's an old post but I think we need to explore this avenue a little bit
more.
That design could be the best solution for MOT; only 2 MOT in series, no
arcing,
no fancy doubler, a voltage around 10KV, less heat in the gaps.
I'm sure some of you could design that.
Please be indulgent with me it's my first try with an electronic software,
check
this link:
 http://pages.infinit-dot-net/luc2/mot_marx.gif
L5 is the primary . I don't have the knowledge to calculate L1 to L4 but I'm
sure some of you could do it.
Give me your comment.

Luc Benard(Montreal)


Tesla List wrote:

> Original Poster: "Antonio Carlos M. de Queiroz" <acmq-at-compuland-dot-com.br>
>
> Tesla List wrote:
> >
> > Original Poster: "Gregory R. Hunter" <ghunter-at-accucomm-dot-net>
>
> > I have just tested an experimental Tesla coil with a Marx generator
> > included in its tank circuit.  Results were most satisfying, considering
> > the hasty, thrown-together nature of my experiment.  The tank capacitor
> > consists of two, 96nF, 8KV MMCs wired in parallel.  This presents a 188nF
> > load to an unballasted pair of 2400VAC MOTs wired in series and driven with
> > 230V-at-20A.  The two MOTs develop 4800VAC, which charges the two 96nF caps.
> > Capacitor isolation is provided by a pair of 100 Ohm, 55W wire-wound power
> > resistors in parallel with the two caps.
> >...
>
> A very interesting experiment. The description, however, is not clear.
> I can't see how the capacitors can be wired in parallel, with the
> resistors in parallel with them. I would expect something like this:
> (use a fixed-width font to see)
>
>                                 gap2
> +-----+---+--R--------+--------o  o---+
> | +   |   | gap1      |               |
> mot   C1  +-o o-+     C2              |
> | -   |         |     |            primary
> +-----+------R--+-----+               |
>       |                               |
>       +-------------------------------+
>
> With two transformers and two capacitors you can apparently use just
> one resistor, that only receives current when the gaps fire:
>                                 gap2
> +-----+---+           +-----+---o  o---+
> | +   |   | gap1      |   + |          |
> mot1  C1  +-o o-+     C2   mot2        |
> | -   |         |     |   - |       primary
> +-----+------R--+-----+-----+          |
>       |                                |
>       +--------------------------------+
>
> I am not sure, however, if the transformer insulations will like
> the sudden voltage changes that occur when the gaps fire. Output
> protection networks may be required for the transformers.
>
> If they support the pulses, even the resistor can be eliminated, but
> mot1 must support the full output voltage:
>
> +-----+----C1----+-----+
> |     |          |     |
> | +   o          o     | -
> mot1        gap1 o    mot2
> | -   o gap2     |     | +
> |     |          |     |
> |  primary       |     |
> |     |          |     |
> +-----+----C2----+-----+
>
> The last two circuits are just speculations. I haven't tried them.
>
> Antonio Carlos M. de Queiroz