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Re: Salt water caps



>Original Poster: "Tom Stathes" <newphreak_16-at-yahoo-dot-com>
>
>Hello all,
>
>I was wondering if anyone could offer some insite on the salt water cap.  I
>presently am using 7 of these in my coil,  Ther are 1L wine bottles,  (They
are
>all Mondave wine bottles.)  They are wraped with Al foil, but not with
tape.
>They each have a cppacitenece of  ~ 0.9nf.  Would wraping them in tape
bring up
>the capacitence.  If i were to go with the saltwater bath method how much
do
>you think it would increase the capacitence by?  I need to make a .03uf
cap,
>but i dont want to use 30 bottles.
>
>Thanks,
>
>--Tom
>


Hi Tom,

I don't think your bottles can hold more 'juice' if you use tape or
saltwater i.o. Al foil, do you think so?
I've made once a saltwater bath cap and it works nicely (for this kind of
cap), but at the moment I covered one bottle with Al foil (and did not
connect it directly!) the bottle was pierced (plastic bottles). This
indicates clearly a higher efficiency ot the cap and of course that they
were to weak for the used transformer. If you want to make a 30nF cap, you
really should try an extended polyethylene rolled cap (look for the
description on the www.pupman-dot-com archives). If you use thin plastic and
connect them serial, the voltage over one cap will not be that high, so I
believe that working with oil could be avoided. I will certenly try this
approach.
However, there are members of this list (with a lot more TC experience) who
are convinced that oil is necessary. Maybe you should look what is available
and what is easy to get. You will be surprised what is possible when you
change the buying attitude into the reuse attitude. When I drive through the
country, I'll see potential caps and coils everywhere!

Ruud de Graaf
Greetings from lovely and wet Holland