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Forums
4hv.org :: Forums :: Tesla Coils
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Help with coil-- MMC, primary

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potatorage
Wed Apr 29 2009, 10:23PM Print
potatorage Registered Member #1891 Joined: Wed Dec 31 2008, 02:30AM
Location:
Posts: 21
I am using 12 caps-- 6 in series x 2 in parallel to get a total rating of 15nf and 12000v, is this good for a 9000v 30mA NST?
Also: I have wired the caps in a sheet of cardboard, do you think this will be good? What wire should I make the primary circuit out of-- and how many turns?
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Coronafix
Wed Apr 29 2009, 11:12PM
Coronafix Registered Member #160 Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938
You are in need of some major researching before you go any further. Try Google, it's your friend.
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ElectricalEngg.
Thu Apr 30 2009, 05:29AM
ElectricalEngg. Registered Member #1946 Joined: Sat Jan 31 2009, 11:37AM
Location: India
Posts: 43
Link2

I was told abt this site on this forum
You should go through it
It explains you many things abt tesla coil in very detail :)

you need the output voltage of at least 18 kV
Capacitance values for the primary capacitor usually vary between 0.05 mF and 0.2 mF. The capacitor choice influences both the primary resonance frequency and the maximum available pulsed power for the Tesla Coil. My tesla coil used a rating of 0.01 mF.


:)
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TheBoozer
Thu Apr 30 2009, 09:01AM
TheBoozer Registered Member #1535 Joined: Wed Jun 11 2008, 11:37PM
Location: Northeastern Pennsylvania - USA
Posts: 117
I believe mF refers to millifarad. I think you meant uF which refers to microfarad. :)

0.05mf = 50uF!!! That's one massive tank cap. :)

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ElectricalEngg.
Thu Apr 30 2009, 01:31PM
ElectricalEngg. Registered Member #1946 Joined: Sat Jan 31 2009, 11:37AM
Location: India
Posts: 43
TheBoozer wrote ...

I believe mF refers to millifarad. I think you meant uF which refers to microfarad. :)

0.05mf = 50uF!!! That's one massive tank cap. :)



Yup my bad

I should have written mFD

Thanks for correcting me :)
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Plasma Lover
Thu Apr 30 2009, 02:59PM
Plasma Lover Registered Member #1911 Joined: Mon Jan 05 2009, 06:30PM
Location: Salem, Oregon, USA
Posts: 165
TheBoozer wrote ...

I believe mF refers to millifarad. I think you meant uF which refers to microfarad. :)

0.05mf = 50uF!!! That's one massive tank cap. :)



What does 'u' refer to? That does not mean micro. µ means micro and, therefore, µF refers to microfarad while uF means 'you eff' in 'text lingo'.

I'm sorry, but I dislike when people correct others and their correction itself is incorrect. I feel it is my duty to valiantly step in and piss people off. (Just kidding)

;)

Have a great day,
Christopher Karr
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TheBoozer
Thu Apr 30 2009, 10:22PM
TheBoozer Registered Member #1535 Joined: Wed Jun 11 2008, 11:37PM
Location: Northeastern Pennsylvania - USA
Posts: 117
Ok, that's an even more accurate answer.

I guess I was just to lazy to look up the key code to produce a µF.....



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Myke
Thu Apr 30 2009, 10:58PM
Myke Registered Member #540 Joined: Mon Feb 19 2007, 07:49PM
Location: MIT
Posts: 969
Most people are too lazy to look up the lower case mu symbol so they just use 'u' instead. It's a commonly used replacement for the character. I have seen many caps that don't use mu and use 'u' instead. Also F sometimes isn't capitalized but usually people can tell what is being talked about by the context.

What sort of capacitors are they? Knowing what the dielectric material is made of could help.
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potatorage
Fri May 01 2009, 11:23PM
potatorage Registered Member #1891 Joined: Wed Dec 31 2008, 02:30AM
Location:
Posts: 21
These are the 942C20S47K-F from CDE, they are polypropylene. I think it is I could also do 9 caps in series to get 18kv, and 5nF.
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