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Re: Maxwell Caps

Original poster: "Mike" <mike.marcum@xxxxxxxxxxxx>

It should be close to bullet proof imo. They run pretty reliably on 12kV, so shouldn't have no trouble at all at 7.5kV each. I'm still draining the last bit of oil from that cap I'm gonna dissect (been sitting in a box crack side up). Once it stops dripping I got my dremel tool ready.

----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Friday, April 29, 2005 9:43 AM
Subject: Maxwell Caps

Original poster: "Paul B. Brodie" <pbbrodie@xxxxxxxxxxxxx>

I have a 15 kV 30 mA NST and 2 of the .03 mF 35kV Maxwell caps that I plan to use together in series for .015mF which is LTR and pretty close to the capacitance I have been getting recommended to me and the capacitance I get from different TC software packages. From what I've read about your experience, I should be pretty safe with this setup, right?? I'm usually very cautious about things like this, maybe to a fault but it has kept me out of trouble most of the time. What do you guys think? Thanks.
Think Positive
PS When the subject changes in a thread, like this one has, shouldn't we be changing the subject line so people searching the archives later will be able to find this information? I changed this subject to Maxwell Caps, in case you didn't notice.

----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Thursday, April 28, 2005 7:19 PM
Subject: Re: New Coil

> Original poster: "Malcolm Watts" <m.j.watts@xxxxxxxxxxxx>
> On 28 Apr 2005, at 12:46, Tesla list wrote:
> > Original poster: "Mike" <mike.marcum@xxxxxxxxxxxx>
> >
> > It was using a single 15/60 with a sync rotary gap. On a 0-120v variac
> > gave about 5' sparks at full power for just under 2 min before there
> > was a very loud bang and a mess. At first I thought it was just an old
> > cap with its days numbered, so I tried another. It failed at just over
> > 1-minute, but not as explosively (just made a not-as-loud bang and
> > cracked the case, haven't got around to dissecting it yet). I haven't
> > post pics of it to hot-streamer before, but could if I knew how. These
> > things are tested to 40kvdc (with 35kv rating) and can't take too much
> > more than that unlike mmc's. Runs fine on 12kv ones, but  if I used a
> > 0-140 variac I wouldn't go over prob 130v in (13kV out). With 15 kV
> > nst's you'd need at least 2 in series.
> >
> > Mike
> In my opinion that experience brings into question the cap's
> dielectric material and whether it was rated for the repetition rate
> you were using it at. It also brings into question the firing angle
> of the gap and whether it was firing on every half cycle (as in peak
> voltage applied to the cap).
> Malcolm
> > ----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx> To:
> > <tesla@xxxxxxxxxx> Sent: Thursday, April 28, 2005 12:44 PM Subject:
> > Re: New Coil
> >
> >
> > >Original poster: "Paul B. Brodie" <pbbrodie@xxxxxxxxxxxxx>
> > >
> > >Mike,
> > >Are you saying that using one of the Maxwell .03 mF 35 kV pulse
> > >discharge caps exploded using a 15 kV NST??!! How many mA's was the
> > >NST? How long did it run before self destructing? I have a couple of
> > >these caps and a 15 kV 30 mA NST. Thanks for any info you can
> > >provide. I really don't need any explosions or such. Paul Think
> > >Positive
> > >
> > >----- Original Message -----
> > >From: "Tesla list" <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
> > >To: <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
> > >Sent: Wednesday, April 27, 2005 12:58 PM
> > >Subject: Re: New Coil
> > >
> >msnip....