Re: Quick and dirty capacitors

Hi Yuri
I used Budweiser longnecks for a salt water cap.
These are the returnable kind.
There were four bottles filled to the point where the neck starts with NaCl
solution in a small plastic bucket filled to the same level with NaCl
The total capacitance measured with a Wavetek 27xt was 3.859 nanofarads.
That works out to 0.96475 nf / bottle.  So for a quick approximation you
could just use
1nf/bottle and be close enough to calculate the initial tuning point to be
in the ballpark.

I made some caps out of wax paper and aluminum foil back in the late '70s.
They did not work very well. I figured the problem was too much air trapped
in between the layers
so I tried to make one by heating in the oven with a lot of weight (Bricks)
set on top to make the
layers melt together and squeeze the air out. It was a total flop. I have a
violet ray machine that
has a cap made in that fashion, but I do not know what methods the
manufacturers used to make it,
just that it seems to work fine.

-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Saturday, July 24, 1999 4:58 AM
Subject: Quick and dirty capacitors

>Original Poster: "Yuri Markov" <wmondale-at-hotmail-dot-com>
>I am looking for a way to construct a capacitor who's capacitance I would
>have SOME rough idea about. I've been shooting in the dark too long with
>vast arrays of glass bottles. Could somebody tell me a somewhat quick and
>inexpensive way to make a capatitor out of, say, aluminum foil and wax
>paper? Or, if somebody knows the exact capacitance of a specific type/brand
>of bottle, could they please tell me? I realize I can measure the bottle
>myself - yeah, with an accuarcy of +/- 50%. Not good enough. So if anyone
>knows roughly the exact capacitance of a certain brand of bottle, PLEASE
>tell be. I'd appreciate it a WHOLE lot. Thanks.
>-Yuri Markov
>Whose wrist is very sore from hand winding three pound of magnet wire
>Get Free Email and Do More On The Web. Visit http://www.msn-dot-com