Krill Labs - How to make a Beer Bottle Capacitor

About:
If you need a high voltage capacitor bank but you don't want to drop several hundred dollars to do it, then this
is the perfect solution! It's rugged and ghetto, but it's also cheap and effective.

***WARNING!!!
While this is something made from common everyday household items, the operation of these babies is by no means, "common".
When attached to a circuit, these are just as dangerous as real HV capacitors and should be treated as such. Their
capacitance at the voltages these capacitors can store is leathal. Extream care and all out safety should be observed when
handling these. If you are not comfortable and knowledgable with high voltage equipment, do not attempt this at home!

Picture Series:

Items you'll need: Screw-off beer bottle, 6inch carriage bolt with 2 nuts, heavy duty aluminum foil, a water bottle cap, salt,
cooking oil, and electrical tape.

First thing, tightly wrap the largest part of the bottle with the foil.

use a smaller piece to also cover the bottom.

cover the sides of the bottle with electrical tape so that only the bottom is exposed.

drill a hole through the cap, and mount the bolt to the cap.

next prepare a pitcher of warm water and fill it with the salt until it won't disolve any more. distribue your brine into all of
the bottles so they all have the same salt content (in other words, don't mix a different salt batch for each bottle or they could all
end up with differing capacitances). Also, only fill the bottle up with the salt water up to the foil level. Fill the rest of the bottle
up with vegitable/mineral oil to about an inch from the top to allow for the displacement of the bolt once submerged. The oil will
help suppress corona leakage during charging.

put a little glue or silicon into the threads of your cap, screw it on, and BAM! You've got cheap yet functional HV capacitors!

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