Re: REAL CAPACITOR (where can i buy one?)

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

Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" <uncadoc-at-juno-dot-com>

Hi Drew, you want a good indestructible cap?  Get barium titanate
doorknobs!  These things rock!  I run them for 60 minutes at a time,and
if stacked properly they will NOT overheat or drift.  So forget about all
the hate mail you will get about the barium titanate caps drifting when
hot, just stack them properly and they will exceed all your expectations,
they rule!!!!!  Stack them properly for your coil and you will have a
reliable easy to use and interchangeable bank that will survive any and
all power that you put into them.  And if stacked properly, they will
easily exceed any rating of your power supply. I have still yet to see
anyone on the list that can run a set of other kinds of caps for 60
minutes at a time on their coils without overheating.  All I get is, well
gee wiz, who needs to run a coil for a 60 minute period!  Well now, if
you are serious about experimentation with wireless power transmission,
then only a good quality cap will get you there   Commercial caps like
the Maxwells,etc are also good if you have a predestined tune, but you
better have your coil right on the money to use a Maxwell, if not, then
your coil will not fire properly.   If You just want to frighten people
for a small run then get other kinds of caps for your coil.  So Drew, if
you really want to fire your coils with easy interchangeability and
optimum tuning and flexibility at high CONTINUOUS power levels, then get
good quality barium titanates for your cap bank and you will be amazed at
the spark output of your coil!  J.M.O!  Only those of the Siberian Khatru
would dare understand!   Al.

On Mon, 09 Apr 2001 18:42:11 -0600 "Tesla list" <tesla-at-pupman-dot-com>
writes:
> Original poster: "Drew Murray by way of Terry Fritz 
> <twftesla-at-uswest-dot-net>" <drewallmighty-at-hotmail-dot-com>
> 
> Hello Everybody,
> Yes, it's me ....DREW!
> I'm Back and i am aiming to get my coil working better than ever. 
> You may 
> remember some of my earlier posts from before the science fair such 
> as:
> DArN CAPACITORS
> My PT is loud!
> and so on.
> I won second place and $80 (measly i know) in the physics category 
> at the 
> new brunswick provincial science fair that was held at the 
> university of 
> moncton.
> I am now using my coil to put on shows during intermission at school 
> plays 
> and variety shows. It has gained me a lot of popularity. (HE HE)
> I am 15 years old and i am making nearly 4 foot long sparks with my 
> ,so 
> called masterpiece of a tesla coil! People call me a genius and 
> stuff.
> I am rather tired of frigging around with square sheets of plastic 
> and al 
> foil for my capacitor. It worked pretty good for an uncalculated 
> capacitor. 
> Vapor barrier melts! 1 gallon zip lock bags do not melt, this makes 
> them 
> much better for dry capacitors. I wonder why this is. Anyway, i 
> better get 
> to the point. I have the school's permission to buy a capacitor with 
> pretty 
> much an unlimited budget. I have lots of cash and i want a capacitor 
> that 
> will make my tesla coil kick!
> I want a professional Polypropylene pulse discharge capacitor, so 
> where do i 
> buy one? I am in New Brunswick, Canada, so i want it from a company 
> that is 
> somewhere on this side of the planet! I am not really interested in 
> MMC's 
> because i have heard from a reliable source that they suck, 
> performance 
> wise, compared to professional pulse caps.
> I have a 1kva 120:4200 PT and i am feeding 300v into it. I am using 
> a 20 ohm 
> 4.5 amp max rheostat and a burned out 250va 10000v oil burner 
> igniter in a 
> series with the pt for current limiting. I have no idea what is 
> coming out 
> of the PT, except that it is somewhere around 10500v. I have been 
> running it 
> this way for a few months now and it never gets warm. Is there some 
> way that 
> i can calculate just what is coming out of it so i can determine 
> what size 
> of capacitor i will need.
> Any help, advice and/or comments would be greatly appreciated!
>                                                             
> Sincerely,
>                                                             Drew 
> Murray
> 
> Notes:  Always build a plate capacitor with a little higher 
> capacitance than 
> required if you are going to have it in mineral oil. The plastic 
> will swell 
> and lower the capacitance drastically, causing performance to lax.
>
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> 
> 

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