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Forums
4hv.org :: Forums :: Tesla Coils
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An idea for a TC cap bank

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Adam Munich
Mon Feb 28 2011, 02:17AM Print
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
 		What if one were to use silver nitrate to silver some jars/beer bottles? Link2

Since the silver is all but attached to the glass on a microscopic level I'd imagine such a capacitor to be very stable. Soaked under oil it should be able to handle some fairly high powers, and there would be no corona.

Anyone with access to chemicals want to try this?
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Dr. ISOTOP
Mon Feb 28 2011, 02:25AM
Dr. ISOTOP Registered Member #2919 Joined: Fri Jun 11 2010, 06:30PM
Location: Cambridge, MA
Posts: 652
 		Glass has a high RF dissipation factor, which makes it inherently unsuitable as a dielectric in TC caps.
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Adam Munich
Mon Feb 28 2011, 02:32AM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
 		Well it doesn't necessarily have to be glass. It could be plastic containers or even polypropylene, polyester or mylar sheets.
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Fabio
Mon Feb 28 2011, 10:37PM
Fabio Registered Member #122 Joined: Fri Feb 10 2006, 12:55PM
Location: Milano Italy
Posts: 148
and there would be no corona

Why???

even if the corona cannot take place between glass and the plates it will always formed around the edges of the metallization, anyhow, the salt water works better than the metallization for preventing the corona losses because there isn't a sharp edge and because a small layer of oil is always added and left float over the saltwater to prevent evaporation and for insulating purposes.


I personally didn't suggest the use of a silver metallization because is a big chemical mess and the result is usually thin and disomogeneous, if you want a waterless leyden jar you could use two thick electroplated electrodes instead (wich can easily made by using copper sulfate, sulfuric acid, demineralized water, some scrap pieces of copper as anode, graphite spray for making the first conductive layer around the glass and many hours at few hundreds of milliamperes to do the job).


Ciao!
Fabio.
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Adam Munich
Tue Mar 01 2011, 02:23AM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
 		No, I meant there's be no or very little corona under oil.
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Muttyfutty!
Tue Mar 01 2011, 02:50AM
Muttyfutty! Registered Member #2915 Joined: Fri Jun 11 2010, 10:41AM
Location: Malaysia!
Posts: 101
 		Good idea, but why not just put homemade rolled caps under oil?
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Adam Munich
Tue Mar 01 2011, 03:38AM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
 		Well you could, but since the silver would be much closer to the dielectric the the foil could ever be, you'd get more nF into a smaller space.

The thickness could be an issue though, so putting a piece of alu foil atop the silver plating could increase the current handling ability.
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Herr Zapp
Tue Mar 01 2011, 09:32AM
Herr Zapp Registered Member #480 Joined: Thu Jul 06 2006, 07:08PM
Location: North America
Posts: 644
 		Grenadier -

How do you propose to make an electrical connection (capable of carrying scores or hundreds of amperes) to these microns-thick metal films?

Herr Zapp
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Adam Munich
Tue Mar 01 2011, 11:26AM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
 		Via the aluminum foil. Let it hang off the sides, then twist up like a tootsie pop and connect some wires.
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Herr Zapp
Tue Mar 01 2011, 04:35PM
Herr Zapp Registered Member #480 Joined: Thu Jul 06 2006, 07:08PM
Location: North America
Posts: 644
 		"Let it hang off the sides, then twist up like a tootsie pop and connect some wires."

And how do you connect to the metallization on the inside of the bottle?

Herr Zapp
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