Hi Scott.
Thanks for reply.
No voltage dobblers or anything in your setup? About 4.5 kV AC?
Bst rgs Martin
2016-12-23 16:16 GMT+01:00 Scott Bogard <sdbogard@xxxxxxxxx>:
> If I could just chime in, I honestly think the best MOT design, as far as
> something for students, is a simple twin MOT (center tap grounded). I get 5
> foot arcs from mine, and it requires very little work or know-how, zero
> expense, and has proven incredibly durable (and I've burned up literally
> dozens of MOTs doing things wrong, so when I say durable, I mean bullet AND
> fool proof). Just use no ballast, and size your cap to match your
> breakrate so that you get 70-ish percent charge per bang (async spark gap).
>
> On Thu, Dec 22, 2016 at 2:48 PM, Martin Slinning <martinslinning@xxxxxxxxx
> >
> wrote:
>
> > Hi tedl in New Zeeland!
> >
> > Exellent! Fantastic!! This is the kind of setup we are looking for. Do
> you
> > still have access to it? Or, do you have pictures? How did you solve the
> > part with just the outer two in transformer oil? This is really
> > interesting. I think this is the biggest setup i have heard of so far!
> > I think we can manage from your decription, but some pictures would
> really
> > help..
> >
> > Best regards
> > Martin
> >
> > 2016-12-22 9:13 GMT+01:00 TESLA <tesla@xxxxxxxxxxxxxxx>:
> >
> > > Hi Martin
> > >
> > > I built a really high power tesla from MOT s (14 in the whole machine)
> > >
> > > * That was 6 MOT's in primary centre ground 3 per side (shunts
> removed)
> > > input load shared by separate power to each half of the 6 MOT's
> > > * Considerable PFC was used and NO other ballasting was needed (drew
> 50a
> > > or so from my 230v supply at full bore)
> > > * Outer MOT's in xfrmr oil (no mains eths used, some like to apply
> that
> > I
> > > recommend swamping capacitance between core and secondary and core and
> > > primary to equalise stress if floating core
> > > * FW bridge of 3A 1kV diodes (just lots and lots used overkill and no
> > > equalising components)
> > > * DC Pi filter of 2uF caps and 10mH MOT arrage (gapped MOT's of 0.3mm
> > > array of 4 , 2 in series then parallel two of those)
> > > * Ring up inductor another array of 4 gapped MOT's (parallel two sets
> > of
> > > 2 in series)
> > > * DQ of about 50 1n4007
> > > * Bleeders on ALL Caps (several independent chains in case one chain
> > went
> > > open)
> > > * 90nF Cp (Used CDC 942C series 942C16P33K, for big coils these are
> > > better value than the so called Geek group ones
> > > * 300bps rotary SG (was sync but need not have been)
> > > * Big secondary and large topload (8" and also a 12" at times and
> 300mm
> > > x1.1m top)
> > >
> > > That beast did well over 10kVA and over 3.5m arcs, it is perhaps a
> little
> > > ambitious but makes good use of very cheap components,unsafe in the
> hands
> > > of untrained users, I recently gave it to an enthusiast with better
> > > location to use it. Needs a dedicated supply (spa pol in my case, all
> > > stoves and water heaters switched off when it was running to keep pole
> > fuse
> > > intact.)
> > >
> > > Good luck tedl in NZ
> > >
> > > -----Original Message----- From: Martin Slinning
> > > Sent: Thursday, December 22, 2016 5:15 AM
> > > To: tesla@xxxxxxxxxx
> > > Subject: [TCML] Tesla coil setup using MOT
> > >
> > > Hi.
> > > My students and i have just finished building av flyback/zvs coil and
> > want
> > > to step up to a New coil using MOTs. We have seen different setups but
> we
> > > are looking for tips on how to build the most effective coil. In Norway
> > we
> > > have limited access to NST, but MOTs are no problem. We have now about
> 11
> > > mots and a bunch of MO caps and diodes.
> > > We are planning on making av rsg using av 2800 rpm motor and an
> inverter
> > > to raise to 150-200 Hz to get whatever rpm we need.
> > > Anyone who can give us tips on what to do, and not do, are greatly
> > > appreciated.
> > >
> > > Best regards
> > > Martin Slinning.
> > > (Teacher Electric automation at Norwegian highschool.)
> > >
> > >
> > > Sendt fra min iPhone
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