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RE: [TCML] DIY Tank Capacitor - Plate configuration confusion



without reviewing the diagrams, the following thought experiment might be helpful

let's imagine a series stacked plate capacitor - where T indicateds the terminal, D means Dielectric, and M neans a metal foil conductor.  It would look like this:

t-m-d-m-d-m-d-m-d-m-t   right?

ok, now think about the foil (m) layers in the middle - they don't actually do anything - they aren't connected to anything - all they do is lie between two dielectric plates (d).   So, when you think about htat capacitor, it really is the same as:

t-m-dddd-m-t

So, what you are doing by putting capacitors in series is really the same as what you get by increasing the gap between the plates/thickening hte dielectric.  So, if you were using 1/8 inch glass, for example, you couild go to 1 inch glass, keeping hte metal foil plates the same size, and you would get the same effect as putting 8 of the 1/8 glass capacitors in series.

does this help a little?


> Date: Wed, 24 Sep 2008 17:11:02 -0400
> From: ka1bbg@xxxxxxxxxxx
> Subject: Re: [TCML] DIY Tank Capacitor - Plate configuration confusion
> To: tesla@xxxxxxxxxx
> CC:
>
> HI, Grant, first there are no idiots on this list.....some have much less
> knowlege of coils, some have extensive physics, electrical, engineering
> backgrounds, math background who often give regularly of the
> knowledge....write programs, and might even be a ham radio operator as i
> am.....so skip the idiots...Jeff Behary who runs
> www.eletrotherapymuseum.com/
> has a huge stack of older information, and i bet he would be able to point
> you to some information, despite how busy he is..
> for stacked capacitors.......cul brian f.
>
>
> www.genapro.com
> ----- Original Message -----
> From: "Grant Visser" 
> To: 
> Sent: Wednesday, September 24, 2008 1:26 PM
> Subject: [TCML] DIY Tank Capacitor - Plate configuration confusion
>
>
>> Hi all,
>>
>> I have held off on asking this question for many many MANY hours because I
> was :
>> 1. 98% convinced that my memory of the theory was correct so didn't
>> want to embaress myself by seeming just plain stupid.
>> 2. 100% convinced that a few seconds research on the net would not
>> only confirm my theory but also give me a bunch more ideas to play
>> with!
>>
>> Well, following many many MANY hours of searching the net and reading
>> way too many articles/papers/tutorials/etc. on capacitors, my
>> conviction regarding my theory has dropped to around 2%, which is low
>> enough to be extremely depressing but not low enough to allow me to
>> simply give up, so here I am ..... ready to embaress myself! LOL
>>
>> I have built a few smaller stacked plate caps in the past, have also
>> blown a few so no problem there. Am certainly no guru in the field of
>> amateur electronics but am also no .... idiot .... or at least I
>> didn't think I was until today!
>>
>> Capacitors can be wired in parallel to increase capacitance or in
>> series to decrease capacitance and to spread the voltage load (as in
>> an MMC array).
>>
>> When constructing a stacked plate capacitor the cells are hooked up in
>> parallel thus this type of DIY cap is often referred to as a "Parallel
>> Plate Capacitor" and bunches of these can be strung together in series
>> to build up a tank capacitor suitable for the intended use.
>>
>> Don't 'think' I have made any mistakes yet so so far so good!
>>
>> My theory, which I was convinced was ELEMENTARY, is the source of my
>> confusion at this stage because I have been completely unable to find
>> any reference to it in my hours and hours and HOURS of searching!
>>
>> ALL I wanted to do was to use a SERIES STACKED PLATE configuration in
>> each of my capacitor modules to increase the Voltage Capacity of each
>> individual module. I could then wire these modules externally in
>> parallel or indeed in any configuration required for my application.
>>
>> I really didn't think that using a series stack configuration would
>> pose any challenges but now I am not so sure!!!
>>
>> I have put together a diagram simplifying what I wanted to do for clarity.
>>
>>
> http://i238.photobucket.com/albums/ff108/FreeekyG/FreakyTesla/FreakyCaps.jpg
>>
>> PLEASE, I would be most grateful if you would take a moment and let me
>> know if (D4) and (D5) are workable as I thought or if I am indeed ...
>> an IDIOT! *grin*
>> If my concept of the Series Stacked Plate Capacitor doesn't work or
>> has "issues", PLEASE could you explain why or maybe point me to some
>> reference material so that I can figure this one out!
>>
>> Very best regards
>> Grant
>> _______________________________________________
>> Tesla mailing list
>> Tesla@xxxxxxxxxxxxxx
>> http://www.pupman.com/mailman/listinfo/tesla
>
>
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