Should the bottom roller be grounded then?
That means i Will need to get solid metal roller and some kind of brush
system. I don't have a lathe but my dad has a mini one that would work
perfect for this!
Suggestions on the best way to ground a spinning metal roller/axle?
Thanks again,
MAtt Sweeney
On Wed, Sep 9, 2015 at 6:44 AM, Finn Hammer <f-h@xxxx> wrote:
> Matthew,
>
> Gurrent limiting by a series of resistors. In my work, I have used 10pcs.
> of VR37 resistors each 12Mohm.
> But limit down to less than 1mA
> The purpose here is to limit the current to a level where there is only a
> faint corona at the tips of the charging comb. You may be able to hear
> it, but otherwise it should only be visible in total darkness. Too much
> current, and there is the possibility that arc discharge takes place, and
> this ruins the belt in short order.
>
> Hope this helps, Finn Hammer
>
>
> ----- Original meddelelse -----
>
> > Fra: Matthew Sweeney <msweeney23@xxxxxxxxx>
> > Til: Tesla Coil Mailing List <Tesla@xxxxxxxxxx>
> > Dato: Ons, 09. sep 2015 07:11
> > Emne: Re: [TCML] High voltage diodes
> >
> > Oh I forgot to mention, any good suggestions for current limiting
> > here?
> > 30ma is far too much for a VDG am I'm sure most of it's going to be
> > wasted
> > anyway. Do i need a good old variac or some other cheaper
> > alternative? Will
> > a light dimmer really work i this situation?
> >
> > Thank you!
> >
> > Matt Sweeney
> >
> >
> > On Wed, Sep 9, 2015 at 12:01 AM, Matthew Sweeney
> > <msweeney23@xxxxxxxxx>
> > wrote:
> >
> > > Hello, all does anyone know a good source for HV diodes for
> > rectifying
> > > NST? Specifically up to 15KV at 30ma I would assume I need to
> > account for
> > > RMS so probably around 20KV.
> > >
> > > I think I can get away with just one for half wave and maybe a cap
> > for
> > > smoothing it a bit, but that would need to be a pretty decent cap
> > to deal
> > > with 60HZ at that voltage.
> > >
> > > I'm using this to build a HV DC fed VDG does anyone have any hints
> > or
> > > suggestions? I know I can find both diodes and caps in microwave
> > ovens but
> > > its a pain to pull them apart and they are commonly too low
> > voltage.
> > >
> > > I have found a few online retailers just wondering if there may be
> > an
> > > alternate source, or anyone have some for sale etc.
> > >
> > > Thanks for any help!
> > >
> > > Matt Sweeney
> > >
> > _______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxx
> > http://www.pupman.com/mailman/listinfo/tesla
>
>
> Mvh. Finn Hammer
> _______________________________________________
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>
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