Re: Perfecting my final design...

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: robert heidlebaugh <rheidlebaugh@xxxxxxxxxxxxxx>

Christopher: Your capacitors can be used in parallel to filter a power
supply or you can put them in series with 10 more to reduce the total
capacitanceand increase your voltage rating to a usable level. They are
useful for a vacuum tube coil.
      Robert    H
--


> From: "Tesla list" <tesla@xxxxxxxxxx>
> Date: Tue, 14 Jun 2005 17:07:59 -0600
> To: tesla@xxxxxxxxxx
> Subject: Re: Perfecting my final design...
> Resent-From: tesla@xxxxxxxxxx
> Resent-Date: Tue, 14 Jun 2005 17:08:48 -0600 (MDT)
>
> Original poster: "Chris Rutherford" <chris1@xxxxxxxxxxxxxxxxxxx>
>
> I can't answer your question, but I'm slowly building/designing my first
> Tesla coil, unfortunately I *may* have just waited about $200 on some
> capacitors that may be useless.  I purchased 10 * 2500V 1.3uF microwave
> capacitors, they charge up nicely and produce a nice crack when discharged,
> except when thinking about their make up (liquid filled) and their 50Hz
> frequency rating, when I start to pulse them in the Khz range they may
> start to heat up due to losses etc.  Can anyone advise?  If they're no good
> as high voltage pulse capacitors would they be any good in a voltage
> multiplier circuit to drive a pulse capacitor? Or should I just use 4 * 4KV
> transformers with secondary in series??  Any ideas what I can do with 10 *
> 2500V 1.3uF 50Hz capacitors in relation to making a Tesla coil??
>
> Thanks
>
> Christopher
>
> ----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Tuesday, June 14, 2005 7:02 PM
> Subject: Re: Perfecting my final design...
>
>
>> Original poster: "Adam R." <arabraxas@xxxxxxxxxxx>
>>
>>
>> I'd like to go with a large cap but I just expanded it! I am using the CD
>> caps (2000v .15uF) and have two strings of 15 for a .02uF cap bank
>> total...it does not look like I can easily get some more of those caps
>> (cheaply).
>>
>> Here are the results of the spread sheet, the inductance is much higher
>> than I thought.
>>
>> Diameter of tubing 0.25
>> separation of turns 0.25
>> Number of turns per spiral 10
>> Radius inner turn 4
>> Separation of spirals 2
>> length     TOTAL 2.5
>> n            TOTAL 100
>> L            TOTAL 3003.5
>>
>> Also, shouldn't the two spirals be wound in opposite directions so the
>> magnetic field matches?
>>
>> I'm worried working with the acrylic: I don't have special bits to drill
>> with it or saw it so I hope when drilling it won't crack and its only 1/4"
>> thick. To hold the copper tubing in I'm using PE cutting board strips. How
>> can I bolt the PE down? I'm guessing just extand 1/8" nylon bolts on the
>> strips.
>>
>> The distances btw the two coils will be adjustable so I can experiment
>> differing setups.
>>
>> Even just using two layers of 5 turns (6 or even 6.5"dia center) of .25"
>> Cu tubing spaced .25" apart (hopefully enough room to put 1/8" bolts?)
>> sounds like it'd work (with the .02uF cap). I'm just worried about using
>> thin bolts (1/8") but then that'd lower the risk of fracturing the
>> acrylic. (However, the center holes for the secondary are 1/4")....so
>> should I shoot for 5 turns? I might even be able to make a crappy mock
>> setup and test it with my L meter.
>>
>>
>
>
>