Re: aol cd plate cap?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "jimmy hynes by way of Terry Fritz <twftesla-at-qwest-dot-net>" <chunkyboy86-at-yahoo-dot-com>


i had the same idea  i measured the resistance of the reflective stuff and it
was kinda high so i tried cutting aluminum foil to fit it. for some reason i
couldnt measure any more capacitance with 5 cds than with one i dont know if i
had shorts or just a bad meter, i just gave up and made saltwater caps. i put a
cd in between the hv wires of my s.s neon transformer. it did the thing the
plasma spheres do the arc widens at the end and kinda looks like a suction cup.
i think it didnt actually puncture it but just acted like capacitance. that
might have been enough capacitance to drop the voltage below 15 kv. at 20khz it
doesnt take much capacitance to let current through. 

 Tesla list wrote: 
>
> Original poster: "Laurence Davis by way of Terry Fritz " 
>
> while pacing thinking about WHEN my mmc caps will show up i started
> to think about cap design.
>
> on my table was 3 or 4 aol cds. made of polycarbonate and aluminum.
> caps in series raises voltage rating.
>
> can't remember my calculations right now, but then i came
> up with dielectric strength of 350v/mil for polycarbonate.
> came up with 11 cds for 20kv or so. (cant remember the calcs.)
>
> measured the cap at 0.7 nf or so.
>
> buy a 100pack for 20bux. get the cheapies.
>
> .7nf x 10 (round up) gets me 7nf.
>
> maybe even an air cap ?
>
> let me look up rf dissapation for pc...
> http://members.tm-dot-net/lapointe/Plastics.htm
> rf diss -at- 1mhz .010
> rf dielectric const -at- 1mhz 2.93
>
> i'll try it. i'll take pix of the fire. ;)
> burning lexan. ewww. ! probably bad.
>
> larry.



JImmy