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Re: [TCML] X-ray transformer wiring help!

Hello Curt,

First, I want to say, (which you might know is coming) from what you have
said so far, is "Sir, you are going to run out of lives eventually and
leave your little angel". You must respect voltages at ALL levels. Again
ALL levels. This is not about "tickles and bites". Please think and learn.
Even 120VAC in right conditions will take you OUT.

Please also never touch output of spark gap TC's. Even with objects you
think are good insulators, no matter how long.

That said, I am not much of a spark gap TC fella, especially rotary gap
type. Looks like you have an asynchronous type, which from what I
understand, needs to have a certain "sweet spot" speed to be optimum.

As Jim said, yes will not be able to turn up variac much with x-ray

Yes, your x-ray transformer is rectified and filtered DC.

Did you follow any kind of plans or formulas for your primary and
secondary? Or did you just coble from available stuff around and just put
together with no regard to what is required? What is the capacitance of
your bucket cap? What is the capacitor actually in there? Need all kinds of
details here. This is just a few of many asked here right now.

I would say everything is greatly out of tune in several areas.

Okay, maybe some others will chime in here more knowledgeable on RSGTC's
than me. As I am mostly a vacuum tube coil guy so far.

Chris Reeland
Ladd Illinois USA

Sent from my Samsung Galaxy Tab® S

On Sun, Feb 21, 2021, 4:52 PM Curt Wilson <3wisenconst@xxxxxxxxx> wrote:

> I beleive it is an 80kv xray transformer. I'm not positive if it has
> rectifiers or not I beleive it probably does. I will add a link to photos
> of the inside of the transformer. It did not come with the case or the high
> voltage cables which come to find are quite expensive So i had to find a
> case that would work, which didn't and started leaking oil all over my
> hobby shop. So I pulled it out and lined it with rubber roofing and
> refilled it and temporary am using bare solid 6 Guage copper wire stuck in
> the recieving plug to make my connection too.i know it's no where near any
> kind of safety  standard yet but it's in maternity things up a and
> upgrading as money allows in the mean time I've been tinkering for over a
> month and can light a florescent 48" tube up from 3' away just from my
> primary and the only spark I've gotten from my previous design was about an
> inch coaxed from the toroidal by me with a pair of insulated electricians
> pliers that was a one and done mistake. The 5000volt insulation rating on
> the pliers was no match even for my not quite there yet tesla. I'm a
> builder and welder by trade and so have been wacked with 120 all the time
> 250 from the live side of my switch on my tombstone 200 amp stic welder and
> 480 3 phase messing around in the control panel of my 4 head woodmizer
> resaw. 120 and 240 tickle 480 instantly melted the screwdriver handle to my
> hand and shot the rest of the screwdriver about 8 feet behind me and stuck
> it Into the cinderblock wall behind be which gave me a new appreciation for
> the term "tag and lock out" and I even had a bare hv feed from to mots in
> series jump from the wood I was fractaling and land right on my arm and
> none of them compared to the bite of that coil through the pliers! I'm well
> aware of the dangers of hv and I also have more lives than the pets from
> the movie pet cemetery and acknowledge my guardian angel with a tattoo of
> her on my arm! But I apologize im rambling. In some of the pictures I show
> some of my available electronics items I have at my disposal.  I have huge
> plastic totes of old transformers and chokes resistors all kinds of fuses
> amd diodes, capacitors,  wire wound resistors and gateways and heat sinks
> that friends have donated to my fascination and curiosity of electricity
> and would be more than happy to share with anyone who may need any of the
> items I have. All I ask is that you pay your own shipping. I have more than
> I can even imagine using.
> Here's the link to my photos, lemme know if there's any issues opening
> them. Amd thank you all again for the help with this build .
> https://photos.app.goo.gl/h4Mr2zVLm2yzxaKy9
> On Sun, Feb 21, 2021, 3:29 PM Lux, Jim <jim@xxxxxxxxxxxxx> wrote:
> > On 2/20/21 3:50 PM, Curt Wilson wrote:
> > > My names Curt and I've been trying to get a tesla coil up and running
> > for a
> > > while now. I've used multiple power supplys such as four mots wired in
> > > series parralell with a center tap ground but they did not last
> probably
> > > due to being used for fractal wood burning prior. I have tried NST's
> but
> > > they had the gcfi on them and only worked for the first few minutes. So
> > now
> > > I've moved onto a cathode/anode 80 kva x-ray transformer that feeds
> > through
> > > a bucket capacitor and into a bench grinder with a 6inch plastic fan
> > wheel
> > > that I wove solid copper wire through four of the fins and have a oil
> > > burner point on with side for the pick ups. My primary coil is 9/16" x
> > 1/8"
> > > solid copper ribbon with 1"spacing between coils and my current
> secondary
> > > is 4.5" pvc with two recycled 34 guage magnet wire soldered together
> and
> > my
> > > top load is two old chevy hubcaps hot glued together. I'm running a
> 30amp
> > > variac 125v ac to regulated 125v ac and I can't get past about 30v with
> > out
> > > the fuse blowing. Just when the rotary gap starts to fire the fuse
> blows.
> > > I've tried a mot with secondary shorted between the transformer and the
> > > variac but it didn't seem to make a difference and I've tried a250 watt
> > > 15ohm resistor first where the mot was then tried it between the
> > > transformer and the primary. Both places it just heated up and would
> not
> > > allow any spark at the gap. Any help with the wiring on the transformer
> > or
> > > variac or suggestions would be greatly appreciated! Thanks in advance.
> > > https://photos.app.goo.gl/nPS9fMg36375yAXi8
> > > _______________________________________________
> > > Tesla mailing list
> > > Tesla@xxxxxxxxxxxxxxxxxx
> > > https://www.pupman.com/mailman/listinfo/tesla
> > >
> >
> > What is your X-ray transformer output voltage?  Most Xray transformers
> > have *very* high output voltage compared to what's practical for most
> > home built TCs.
> >
> > Xray - 75-120kV isn't unusual.  Neon Sign Transformer (NST) or Pole
> > Transformer are 12-15 kV.
> >
> >
> > So you should be looking at feeding your Xray with around 10-20VAC.
> >
> > A real issue is that Xray transformers don't have any current limiting,
> > so you'll need a ballast to limit the current (just like pole-pig
> designs).
> >
> > Does your Xray transformer have rectifiers?
> >
> >
> > _______________________________________________
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> > Tesla@xxxxxxxxxxxxxxxxxx
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> >
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