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Re: Maxwell capacitor 35Kv 0.03uf



Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>


High frequency Tesla oscillator currents go both plus and minus literally in microseconds. This plus to minus waveform transition is called a voltage reversal. Example, a peak of 20 kV with a 95% voltage reversal means the cap would go from plus 19 kV and then swing to minus 19 kV in typically 2-3 microseconds. This is a very high rate of dV/dt and with high peak current a high rate of dI/dt. This rapid transition puts enormous strain on a capacitor and usually requires "extended foil" construction techniques to handle the strain.

Dr. Resonance


Hi all,

I'm going to have to jump up and show my ignorance
here but could someone please explain  the concept
of voltage reversals? I've noticed this effect men-
tioned a number of times in reference to pulse capacitors
and I am able to tell the the higher this rating, the better,
but that's about as far as my understanding of it goes ;^\
Thanks in advance for your answer(s).

David Rieben

----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Sunday, July 09, 2006 1:08 AM
Subject: Re: Maxwell capacitor 35Kv 0.03uf


Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>

Voltage reversals typical in Tesla circuits 90-95%. This cap is only rated for max of 50% and average of 15% --- it would be pushed very hard if used in a Tesla oscillator circuit.
Dr. Resonance

----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Saturday, July 08, 2006 8:16 PM
Subject: Re: Maxwell capacitor 35Kv 0.03uf

Original poster: "C. Sibley" <a37chevy@xxxxxxxxx>

The spec sheet for this capacitor is available on my web page:

http://www.wackorama.com/tesla/maxwell_37667.jpg

Curt.


----- Original Message ----
From: Tesla list <tesla@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Sent: Saturday, July 8, 2006 11:43:10 AM
Subject: Re: Maxwell capacitor 35Kv 0.03uf


Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>


What is the pulse duty rating for this cap?

Dr. Resonance


>Hey gang I have a Maxwell pulse capacitor for sale or trade for
>Cornell Dubilier caps of 2000 Vdc .15Mfd if interested please
>contact me off list.
>Specks are
>Catalog no 37667
>Rated Cap 0.03 uf
>Voltage 35Kv
>Ser no. 9645C0116
>