Re: [TCML] Advice for my first SGTC

[Atomic <atomicrox@xxxxxxxxx>]

Hi Mark,

Thanks and congratualations on your great coil!
I haven't seem many dual MOTs without some sort of multiplier circuit but
if they do work as well as yours then I might dump the multiplier. What
kind of filter do you use?

I've bought a cheap LC meter from Ebay to help me measure the bottle caps.
Is there any specific kind of bottle I should avoid?

I might consider switching to 942C's later but I'd really like to make sure
it works and won't blow 200 bucks worth of caps.
Also still interested in knowing if those Russian caps will work - if they
do I'll certainly go for them. I've never heard of
Polyethyleneterephthalate foil caps before.

Cheers

On Tue, Nov 20, 2012 at 6:39 AM, Mark X2 <susax2@xxxxxxxxx> wrote:

> Atomic,
> welcome to the list.
>
> a dual MOT supply will do fine, even without a doubler.
> Mind the doubler part is sensitive to failure, I've blown a lot of diodes.
> Maybe others had more succes with doublers.
>
> Bottle caps are excellent caps to begin with, despite obvious drawbacks,
> like weight
> I started with 72 bottles and doubled it to 144 before getting 942C caps.#
> Here's a video with my old 144 bottle cap
> https://www.youtube.com/watch?v=OGn2jlEV76M
> It took a lot of work to construct the bottle cap, if I had worked those
> hours and got payed, I could have also bought the 942C caps in the first
> place.
>
> I don't know about those caps you found on ebay, but for the money it's
> worth a try for sure.
> Caps sold by the kilogram lol.
>
> Mark
>
>
>
> 2012/11/20 Atomic <atomicrox@xxxxxxxxx>
>
> > Hi guys,
> >
> > I'm new to this list, decided to join to get some advice before building
> my
> > first SGTC. It will use a voltage doubled dual-MOT supply similar to this
> > one <http://www.capturedlightning.org/hot-streamer/greg/Mark_III.htm>. I
> > know NSTs are safer but they're rare around here and I'd really like to
> > achieve 1m arcs :)
> >
> > First thing I need to figure out are the caps, since they're the most
> > expensive component...
> > I don't have much of a budget, which is why I'm inclined to use salt
> water
> > caps. I've already got 30 of
> > these<http://www.costibebidas.com.br/fotografias/grande/2418.jpg>600mL
> > beer bottles and I can get more of them for free. Do you guys think
> > these bottles will work fine?
> > Another option would be making an MMC out of
> > these<
> >
> http://www.ebay.co.uk/itm/6800pF-4000F-4KV-PETP-HV-Capacitors-Lot-90-/200838582258?pt=LH_DefaultDomain_0&hash=item2ec2e98ff2
> > >.
> > They are pretty cheap and 2 packs of 90 should give me 76.5nF@xxxxxxxxxx
> > they work?
> >
> > Sorry for the long post.. hope some day I'll be able to contribute back
> to
> > the list!
> >
> > Thanks,
> >
> > Atomic
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