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Re: [TCML] HV capacitors wanted
Christopher,
Look into a bucket style SW cap. At least the SW is fully contained, maybe
this would make your Dad happy. If you can show that you are taking his
concerns seriously.
While SW caps are less efficient, I found that my spark gap was the greatest
loss when I was messing with medium power coils. While my performance did
get better with a MMC, the biggest improvement in terms of performance was
making a sucker gap. What kind of gap are you using?
Jonathan
www.madlabs.info
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----- Original Message -----
From: "Christopher Karr" <chriskarr4@xxxxxxxxxxx>
To: "Tesla Pupman List" <tesla@xxxxxxxxxx>
Sent: Monday, December 01, 2008 7:49 PM
Subject: [TCML] HV capacitors wanted
Hello, please forget about the whole Chrishitstopher thing, as I was making
a new email address and I didn't want a recognizable name.
I have built the saltwater capacitors, before, and they were very
inefficient, because I used aluminum foil rather than the saltwater for the
outer dielectric. My dad told me that he didn't feel comfortable with me
having high voltages running in saltwater, so I couldn't build the more
efficient capacitor design. I may try it, soon, anyways, out of desperation.
Anyways, I was hoping for some better capacitors that are made for high
voltage by a company so that the losses are at a minimum with a small
package size.
_________________________________________________________________________________________________
Hi Chrishitstopher (?),
Before discussing capacitor specifics, we need to be clear on the
transformer configuration.
OBIT's are typically 10kV @23mA, midpoint-grounded. If you're planning on
wiring the secondaries in series to achieve 20kV, it won't work. The fact
that the secondary midpoints are tied to the case thwarts that plan, and
there's nothing one can do to get around it. Instead, tie the secondaries
in parallel to achieve 10kV @46mA. It will still process the same amount of
power, but won't fry the OBIT's.
The cap size for a 10/46 power supply, assuming you have 60 Hz power and a
static gap, is between 15 & 20 nF.
If money is short, a salt water cap is the cheapest and most reliable route.
I've personally not ever built one, but I understand that a 12 oz beer
bottle is good for about 0.9nF each (but YMMV).
Regards, Gary Lau
MA, USA
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
Behalf Of Chrishitstopher Klaus
Sent: Monday, December 01, 2008 7:06 PM
To: Tesla Pupman mailing list
Subject: [TCML] Capacitors
Hello, everyone. I'm a fifteen-year-old coiler, and I don't have much
money. I'm
working on my first coil (I've gotten it running, before) and my
capacitors recently
broke. What I need is a number of capacitors or a single capacitor rated
at 10nF
and 20kV. I'm building the Tesla Coil with two OBITs in series-parallel
arrangement.
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