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Re: Leyden jar caps (Not shooting for anything gloriuous,but...)
Be careful to not have any copper in the salt water Leydens. because the
copper will corrode
-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Monday, April 19, 1999 8:58 AM
Subject: Re: Leyden jar caps (Not shooting for anything gloriuous,but...)
>Original Poster: Bob <misiura-at-nccoast-dot-net>
>
>
>
>Tesla List wrote:
>>
>> Original Poster: "Antonio Carlos M. de Queiroz" <acmq-at-compuland-dot-com.br>
>>
>> Tesla List wrote:
>>
>> > A better way to make a Leyden Jar capacitor is to use salt water on the
>> > outside as well as the inside of the bottles. It tends to eliminate
>> > corona losses, and if a bottle breaks, the salt water is contained by
>> > the outside container. It does make a series string more difficult
>> > (outside containers must be separated and insulated) and may exacerbate
>> > the shock hazard . . .
>>
>> Why not metal foil inside and outside, of course in a bottle with
>> wide mouth? This is the classical design for a Leyden jar since more
>> than 200 years.
>
>I suggested the salt water primarily as a way of minimizing corona. My
>own experience is that they last longer than foil alone (inside and
>out). If you want a lot of ozone, loose foil is the way to go. Never
>managed to get the inside foil to adhere uniformly to the inside of
>bottles, without a lot of air gaps. Best method was to use aluminum
>foil and inflate a toy balloon, inside the foil, to press it into the
>plastic (and epoxy adhesive).
>
>>
>> And about using salt water, there is a possibility that I don't remember
>> seing discussed in this list, that is to use the water level for
>> tuning, in the simplest way by changing the level of the water at the
>> outer side of the bottles. A particularly convenient disposition
>> could be to use two capacitors in series with the center grounded,
>> in parallel with the power transformer and filter, having also in
>> parallel the spark gap and the primary coil, both in series.
>> The two capacitors would be bottles with salt water inside and
>> outside, with the outside water common and grounded. A pump, or
>> something simpler, as a bucket with water that is rised or lowered,
>> connected to the water around the capacitors by a syphon tube,
>> could be rather safely used for tuning, even with the system powered.
>
>I did try a device to raise and lower the (glass - in this case) bottles
>in the tank. Works really well as a tuning device, particularly if you
>are searching for the ideal capacitor - inductor combination, or trying
>for pinpoint tuning in a coil. The crank handle was a piece of nylon
>bar for safety.
>
>Salt water presents some unique hazards. I found if I got salt water on
>wood, I could wipe it off, and dry it, but if it had a chance to
>penetrate the wood, it would become conductive again when the ambient
>humidity was high.
>
>The siphon or pump idea to raise and lower the electrolyte would take
>some designing to make it safe. Mechanical methods are probably easier.
>
>Take care
>bob misiura
>