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

Hi  Curt,

You need to remove the capacitors inside the x-ray trans case also. The
caps are for after the rectifiers to "smooth or filter" the DC ripple

What is this cap bank built on the pizza box?


I tried sending a message here about 3 days ago, related to this cap bank
and/or bucket cap, but has not posted or was I blocked?

Anyways...this has so many issues, I do not know where to start. Is this
what is shoved inside bucket cap possibly?
Or do you have something else in bucket cap? Need to know what is inside.

Chris Reeland
Ladd Illinois USA

Sent from my Samsung Galaxy Tab® S

On Fri, Feb 26, 2021, 10:22 AM Curt Wilson <3wisenconst@xxxxxxxxx> wrote:

> So I took some advice and removed the rectifiers which ofcourse was an oily
> disaster. I stripped out everything I didn't think I needed being tge two
> rectifier boards and the fillement step down so all that's left is the 2
> center tapped transformers and two capacitor banks one for each transformer
> each containing 10-8,000 vdc caps in them. Now the transformer hums like a
> bugger but I'm getting almost no anything definitely no spark from them.
> But what baffled me was that there were two high voltage leads coming from
> each transformer! But I also noticed that from the rectifiers there was
> also two points that went to the capacitor bank then one from there to the
> outlet.  Should both of them be tied together and go into the same end of
> the mmc then at the other end just have the single line to the outlet? Or
> could I have just connected each opposite each other going to there
> respective capacitor banks putting it out of phaze and crossing each other
> out? Thanks in advance for the help
> On Tue, Feb 23, 2021, 11:03 AM Lux, Jim <jim@xxxxxxxxxxxxx> wrote:
> > On 2/23/21 7:12 AM, Adam James wrote:
> > > Adam Here, None of my business, But perhaps a concern.
> > > Before building my first TC I read all about capacitors and watched a
> few
> > > videos on overcharged capacitors and how they can fail rather
> > dramatically!
> > > On curts setup, with the bucket Capacitor and an 80k to 100k sustained
> > > charge would it be possible for that thing to go "boom"?
> > > AJ
> >
> > The failure mode on bucket caps is cracking of the glass, or arcing over
> > (then cracking the glass).  They really don't store enough energy to be
> > more "exciting" than that.  The usual failure is from dielectric heating
> > aggravated by localized heating from corona.  The glass is a pretty
> > lossy dielectric (same problem with large glass plate capacitors that
> > were popular in the 1950s and 1960s) - as it gets hot, the loss goes up
> > (pretty quickly - after all molten glass is a good conductor) - the
> > hotter spots get lossier, which gets them hotter, until the thermal
> > stress cracks them. Once a crack starts to form, then the problem gets
> > even worse.
> >
> > Bucket caps are also notorious for corona discharge, even at NST
> > voltages (20kV)
> >
> >
> > Fortunately, failures usually just result in a bucket full of broken
> > glass, salt water, oil and aluminum foil. And maybe a small fire, if
> > you're unlucky.
> >
> >
> >
> >
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> >
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