Re: Newark ebay capacitor: primary tank capacitor?

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

Original poster: "Virtualgod" <mike.marcum-at-zoomtown-dot-com> 

Yup, the cheapest new caps for TC's. 150,000pF,2kv (I've ran them at 3-4kv
without them shorting) and about $2.50-$3 each. These beat any doorknob and
probably any other cap out there of enough of them are put together.
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, February 25, 2004 1:25 PM
Subject: Re: Newark ebay capacitor: primary tank capacitor?


 > Original poster: "Hydrogen18" <hydrogen18-at-hydrogen18-dot-com>
 >
 > Alright, what are these 942C's every1 keeps mentioning? I'm guessing they
 > are Cornell Dubilier caps since the CDE?
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Wednesday, February 25, 2004 8:38 AM
 > Subject: Re: Newark ebay capacitor: primary tank capacitor?
 >
 >
 >  > Original poster: Koen van den Berg <cerberus_rex-at-planet.nl>
 >  >
 >  > 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" <tesla-at-pupman-dot-com>
 >  > To: <tesla-at-pupman-dot-com>
 >  > Sent: Wednesday, February 25, 2004 5:22 AM
 >  > Subject: Re: Newark ebay capacitor: primary tank capacitor?
 >  >
 >  >
 >  >  > Original poster: "Hydrogen18" <hydrogen18-at-hydrogen18-dot-com>
 >  >  >
 >  >  > 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" <tesla-at-pupman-dot-com>
 >  >  > To: <tesla-at-pupman-dot-com>
 >  >  > Sent: Tuesday, February 24, 2004 5:51 PM
 >  >  > Subject: Re: Newark ebay capacitor: primary tank capacitor?
 >  >  >
 >  >  >
 >  >  >  > Original poster: Bert Hickman <bert.hickman-at-aquila-dot-net>
 >  >  >  >
 >  >  >  > Tesla list wrote:
 >  >  >  > >Original poster: "Hydrogen18" <hydrogen18-at-hydrogen18-dot-com>
 >  >  >  >
 >  >  >
 >  >
 >
 >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 --
 >  >  >  > --
 >  >  >  >
 >  >  >  >
 >  >  >  >
 >  >  >
 >  >
 >
 >