5 bucks? I got it when it was free. :)
Good program, though... very accurate.
> -----Original Message-----
> From: Tesla [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of twoten
> Sent: Saturday, February 21, 2015 9:42 AM
> To: tesla@xxxxxxxxxx
> Subject: Re: [TCML] Dual identical FRANCE neon sign transformers
> (15000v 60mA each) in parallel
>
> I think that the very first thing you should do is spend 5 bucks on the
> tesla coil design software called TeslaMap. It's invaluable and will
> answer so many of your questions.
>
>
> On 15-02-21 06:26 AM, Timothy Gilmore wrote:
> > Gary,
> >
> > Sounds like a pretty scary adventure veering off from the plans I
> have
> > which indicate simple things such as just adding more capacitance. I
> > think what I will do first is get a working single NST tesla coil
> > first
> > (15kv/60mA) and using the 2nd NST as a backup incase the first ever
> > gets fried. If it looks like the design is stable than perhaps later
> > on I will take on a 2 NST new design. Its been 35 years since I built
> > my first and so much great development has happened and new ideas
> > learned by the smart people here and other places in the Tesla Coil
> > world. Thanks again for your insight and the others here that make
> this such a fun hobby.
> >
> > Tim
> >
> > On Fri, Feb 20, 2015 at 8:02 PM, Gary Lau <glau1024@xxxxxxxxx> wrote:
> >
> >> The only reason to have transformers be identical is a matter of
> >> aesthetics. As long as the output voltage is remotely similar, one
> >> can mix France, Jefferson, whatever, flavors of NST's, if the
> phasing
> >> is correct, and you'll know immediately if it's wrong. It's _nice_
> >> to have them identical but functionally unnecessary.
> >>
> >>> There would be a lot more changes than just caps and gaps.
> >> I would like to amplify the above point. Assuming you want to do
> >> everything needed to extract the maximum arc length from the
> >> additional power at your disposal, repeat over and over - Bigger is
> >> Better. You'll want a larger top load, and you'll want a taller
> >> secondary to space the top load farther from the primary to avoid
> >> strikes to it. The larger top load and secondary will require a
> >> significantly larger primary, not just another couple of turns. I
> >> ended up building a 2-layer primary to keep the dimensions sane.
> >> Higher inductances and lower frequencies are all good!
> >>
> >> Also, a 15/120 power supply is probably going to push the limits of
> >> what a static gap can handle. You didn't mention what you're
> >> planning for a gap but you might wish to consider a rotary. I highly
> recommend the propeller
> >> gap configuration - http://www.laushaus.com/tesla/sync_gap.htm If
> you're
> >> thinking about a synchronous rotary, the capacitor size needs to be
> >> much higher than for a static gap, and will require comparably more
> >> primary inductance.
> >>
> >> And, a 15/120 power supply is going to pull a LOT of juice from the
> >> wall - you'll want to make sure you have an adequate PFC capacitor
> to
> >> minimize current draw. My single 15/60 pulls in excess of 20A with
> a
> >> sync rotary and 240uF of PFC caps.
> >>
> >> Bottom line - you should plan from day 1 what the final
> configuration
> >> is going to be - you'll not be able to go back and forth with 1 or 2
> NST's.
> >>
> >> Regards, Gary Lau
> >> MA, USA
> >>
> >>
> >>
> >>
> >>
> >> On Fri, Feb 20, 2015 at 1:32 PM, Timothy Gilmore <tdg8934@xxxxxxxxx>
> >> wrote:
> >>
> >>> Great videos on Phasing (both parts 1 and 2). I will watch those
> >>> again
> >> when
> >>> ready to set up.
> >>>
> >>> On Fri, Feb 20, 2015 at 9:36 AM, John Paul Grippa
> >>> <pupman@xxxxxxxxxxxx>
> >>> wrote:
> >>>
> >>>> There is a great video from the Geek Group on YouTube that
> explains
> >>>> how this works extremely well. It will also give some good tips
> on
> >>>> how to ensure proper phasing. Check it out!
> >>>> https://www.youtube.com/watch?v=KSlQjw9OPG4
> >>>>
> >>>>
> >>>>> Date: Fri, 20 Feb 2015 08:26:17 -0600
> >>>>> From: tdg8934@xxxxxxxxx
> >>>>> To: tesla@xxxxxxxxxx
> >>>>> Subject: [TCML] Dual identical FRANCE neon sign transformers
> >>>>> (15000v
> >>>> 60mA each) in parallel
> >>>>> I currently have a France NST at 15kv 60mA and built a nice
> jacobs
> >>> ladder
> >>>>> with it. Yesterday on eBay I found what looks to be identical
> >>>>> model
> >> NST
> >>>> for
> >>>>> a good price (no GFI). From what I have read about NST phasing,
> >> having
> >>>>> identical NSTs don't require testing the HV outputs and I should
> >>>>> be
> >>> able
> >>>> to
> >>>>> connect them up in parallel identically using the same sides.
> What
> >>>>> a
> >>>> jacobs
> >>>>> ladder at 120mA would be! Anyway I'm assuming that I should start
> >>>> building
> >>>>> my tesla coil with 1 NST and when it works add the next NST in
> >> parallel
> >>>> and
> >>>>> double the capacitors and change the tap on the primary. Does
> this
> >>> sound
> >>>>> like all I would need to do?
> >>>>>
> >>>>> Thanks - Tim
> >>>>> _______________________________________________
> >>>>> Tesla mailing list
> >>>>> Tesla@xxxxxxxxxx
> >>>>> http://www.pupman.com/mailman/listinfo/tesla
> >>>> _______________________________________________
> >>>> Tesla mailing list
> >>>> Tesla@xxxxxxxxxx
> >>>> http://www.pupman.com/mailman/listinfo/tesla
> >>>>
> >>> _______________________________________________
> >>> Tesla mailing list
> >>> Tesla@xxxxxxxxxx
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> >>>
> >> _______________________________________________
> >> Tesla mailing list
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> >>
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