Re: My PT is loud!

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

Original poster: "Metlicka Marc by way of Terry Fritz <twftesla-at-uswest-dot-net>" <mystuffs-at-orwell-dot-net>

drew,
first off i would say your capacitor plates are shorting across. my
plate caps would hum when they shorted also. are you using any oil for
the cap?
also, do you realize that by placing 300v into your pt your pushing it
to 14847v p-p? that's 3.5 times it's rated input threshold, with any
kick from the tesla coil the insulation stress will be great.
it seems to me that you will have fried your new transformer before you
even get a chance to display it, though you got this one for free, pt's
are hard to come by.
marc m.

Tesla list wrote:
> 
> Original poster: "Drew Murray by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <drewallmighty-at-hotmail-dot-com>
> 
> Hello,
> I am almost finished my coil. I took everyones advice and redid my primary.
> I don't want to risk cooking my secondary with the Vertical helix primary. I
> have finished winding my 8" x 32" pvc secondary. I gave the pipe a thin coat
> of poly before i started winding. I didn't have much left in the can as i
> used it for my last coil. I have all of the current limiting and power
> control equipment set up for the PT and i have been having fun watching the
> heat waves totally distort the wall behind it from my jacobs ladder. It can
> climb untill the flame is something like 5" long. Anyway,
> I have been experimenting with around 323 1 gallon zip lock bags with the
> zip locks cut off, and some foil plates, trying to make a capacitor. I
> noticed that if i got the capacitance way too high, and i turned up the
> variac to the pt, no sparks would jump the 1/2" saftey gap on the pt. It
> worked with a 16 wine bottle salt water cap! When i turned it up to around
> 60% A really loud buzzing/humming noise would come from either the PT or the
> capacitor, which i have watched vibrate voilently before. It would stay loud
> until i turned everything off. What the heck is happening here? It is a
> 120:4200  -at- 1000va, but i have been feeding 300v into it from a step up
> transformer, so i can get 10500v out of it. 4200 just wasn't enough. and
> could somebody show me how to get the right size capacitor with my zip lock
> bags and aluminum plates? I really need to know this.
>                                                        The Young coiler
>                                                         Drew Murray
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