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Re: Puncture voltage
> When we coilers refer to a glass capacitor 'blowing up' it is
> just a figure of speech. There is no explosion,... well
> hardly ever... RSS
Explosions would be another thread. I have had a couple of
secondary coils explode, but never a capacitor. I did hear a
good one from Bill Wysock who blew a glass cased high voltage
filter cap in his living room with impressive results. I have
never heard of a homemade capacitor exploding, generally they
flash a bit of light and go "plutz".
> An alternate to a glass plate and aluminum foil cap is one
> made with beer or wine bottles. Fill them with a saturated
> solutuion of water and table, or rock salt to about 2/3rds
> full. Place all these bottles in a plastic tub which is
> itself filled with the same brine solution so as the level in
> the outer tub, bucket, etc, is the same as the level inside
> the bottles. Loop a piece of bare copper wire, (#14 works)
> into all the bottles making good contact with the saltwater.
> This becomes one terminal of your capacitor. Run a length of
> the same type bare wire around inside and below the surface
> of the saltwater in the tub. This is the other connection.
> RSS
Good cheap beginners cap.. The salt water sinks heat which keeps
things cool. The losses are very high, but they are cheap, easily
built, and easily repaired/maintained. Tesla used salt water
capacitors in Colorado Springs.
> Anyone out there know the capacitance of a beer bottle?
Assuming K ~ 7.0, each bottle has approx. .0005 uF capcitance.
Richard Quick
... If all else fails... Throw another megavolt across it!
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