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Re: [TCML] Seaching for Mike Delosier

Three 15KV 250mA NST's?  Wow!  I've never heard of an NST more than 120mA.
If you're correct about the current rating of those beasts, you'll need
quite a large capacitor array to fully unitize so much power, and building
an MMC might be pushing the limit on when it makes sense to buy a
professional pulse cap rather than the MMC approach.

>  I especially am interested in inductor usage to prevent spikes back to
the NST.

There was a time when it was thought that RF chokes between the active TC
components and the NST was useful in protecting the NST from ill-defined
threats.  More recent analysis suggests that chokes may cause more harm
than good.  My analysis is detailed here:

Current thinking is that an R-C filter is the best protection, couples with
MOV surge suppressors and correctly-set safety gaps, collectively known as
a Terry filter.

Regards, Gary Lau

On Sat, Aug 22, 2015 at 5:10 PM, Matthew Sweeney <msweeney23@xxxxxxxxx>

> Hello, I recently joined this mailing because I didn't know it existed. I
> don't make tesla coils any more but I produce large Van De Graff generators
> and simple kelvin thunderstorm projects to amuse myself and keep my nephews
> amazed.
> Anyway I visited my local Axe-MAn today and learned that they have a
> customer named  Mike Delosier who lives in minnesota and has some
> impressive coils.
> I am hoping very much to contact Mike but I have not been able to find his
> e-mail address. I don't see any recent posts with his name so maybe he is
> not a member anymore?
> So, if anyone knows him, I would be delighted to send him an email.
> Alternatively he can send ME an e-mail as to be less intrusive:
> msweeney23@xxxxxxxxx
> I did build several decent coils over 20 years ago with home made plate
> class capacitors and a horribly inefficient stationary spark gap. I didn't
> have any protection circuitry in place but somehow my HV transformers
> survived, however my capacitor eventually exploded.
> Now I have three perfect 15,000v 250ma NST's just sitting waiting for a
> purpose - so I think it's time to start planning a new build. I have never
> built a proper solid state coil and am considering this option. But a
> traditional rotary spark-cap coil with high-voltage capacitors would be
> much less effort. The secondary will be 5 Feet and using enameled magnet
> wire.
> I'm looking for good sources of (cheap) high voltage capacitors and much
> info on recent developments in the field. I especially am interested in
> inductor usage to prevent spikes back to the NST. Also I need some advice
> on secondary wiring cable is there a preferred variety for recent coils?
> Ill use copper tubing for primary. I may also build my own rolled
> capacitors but I'm thinking obtaining newer HV caps in a bank may actually
> be cheaper.
> If there other members in the Minnesota/Wisconsin I would also like to
> connect. I'm desperate to find a powerful coil to blow my nephews minds =)
> Thank you for any help you can provide. I'll be reviewing the lists looking
> for new info also but direct contact for any suggestions would be welcomed.
> Regards,
> Matt Sweeney
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