Re: Newark ebay capacitor: primary tank capacitor?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: John <fireba8104-at-yahoo-dot-com> 

Eric,
Just get the geek group caps. You will almost never be able to kill them, 
even over-voltages!
Cheers,
John

Tesla list <tesla-at-pupman-dot-com> wrote:
Original poster: Koen van den Berg

Hi Eric

Although the capacitance is quite low, you could use this type of caps in
tank circuits. I've seen them used here and there on the internet, but
you'll need to find an alternative source; the auction's finished... If you
could get your hands on some more of them, perhaps some that are a bit
larger in terms of capacitance, that could be a good start. You don't need
ideal capacitors for your tank circuit. I started out with approx. 400
ceramic capacitors. I ended up replacing them with 48 CDE 942C capacitors.
They work way better, offering me a larger capacitance and better
reliability. If I were you, I'd bite the bullet and just get some 942C's,
because you'll be getting those eventually anyway, if you keep coiling, that
is. Even thought they are a bit expensive, it'! s a good investment. Just my
.02 cents, though.

Koen

----- Original Message -----
From: "Tesla list"
To:
Sent: Wednesday, February 25, 2004 5:22 AM
Subject: Re: Newark ebay capacitor: primary tank capacitor?


 > Original poster: "Hydrogen18"
 >
 > Alright ,what about these caps:
 >
 > http://cgi.ebay-dot-com/ws/eBayISAPI.dll?ViewItem&item=2597981535
 >
 > sry if I'm being annoying.
 >
 > ---Eric
 > ----- Original Message -----
 > From: "Tesla list"
 > To:
 > Sent: Tuesday, February 24, 2004 5:51 PM
 > Subject: Re: Newark ebay capacitor: primary tank capacitor?
 >
 >
 > > Original poster: Bert Hickman
 > >
 > > Tesla list wrote:
 > > >Original poster: "Hydrogen18"
 > >
 >
 >http://cgi.ebay-dot-com/ws/eBayISAPI.dll?ViewItem&item=2597989262&category=4662
 > > >could that capacitor(in series obviously) handle the stresses of
primary
 > > >tank capacitor duties? Also, can some1 point me to reference so I can
 > > >convert uf to nf, pf and uf, and so on? I know 10^-9 is nano and 10^-6
is
 > > >micro but that doesnt mean much to a mid class geometry student.
 > > >
 > > >.
 > >
 > > Dear (what's your name?),
 > >
 > > These caps are Mylar. Because they are very lossy under RF use and the
 > > package does not allow for "graceful" expansion, they tend to become
oily
 > > firecrackers when used in Tesla Coil tank circuits. They are usable
only
 > as
 > > DC filter caps, in voltage doubler circuits, or in low pulse rate
(non-RF)
 > > applications. :^(
 > >
 > > 1 uF! = 1,000 nF = 1,000,000 pF
 > > 1 nF = 0.001 uF = 1,000 pF
 > > 1 pF = 0.001 nF = 0.000001 uF
 > >
 > > These caps are 0.25 uF = 250 nF = 250,000 pF
 > >
 > > Best regards,
 > >
 > > -- Bert --
 > > --
 > >