RE: [TCML] poor coil performance again- help!, torroid sizing

["Jim Mora" <wavetuner@xxxxxxxxx>]

I don't remember but I think it was Richard Hull or Quick that recommended
2/3 length major diameter. A full length may require more power for
breakout?

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of bunnykiller
Sent: Tuesday, April 22, 2008 3:55 AM
To: Tesla Coil Mailing List
Subject: Re: [TCML] poor coil performance again- help!



bartb wrote:

>> snippp
>

>>
>> If you want a good performing coil, then you need to design with the 
>> following in mind:
>> 1) 900 to 1300 turns.
>> 2) H/D ratio between 4 and 5.
>> 3) A coil diameter of 4" or larger.
>> 3) Good static gap with lots of air cooling or srsg.
>> 4) A transformer about 12kV or near with at least 60mA.
>> 5) An MMC cap designed for LTR operation (it's value) for the static 
>> gap or srsg (and those values are different).
>> 6) A primary that tunes between 10 and 15 turns.
>> 7) A toroid sized appropriately for breakout, loading size, and as 
>> smooth as you can get it. 
>
I find that #7 parameters "following the rule of thumb" is...  minor 
dia.of toriod is approximately = to secondary dia. and the major dia is 
approximately = to secondary length for a good starting point when 
building a coil.


Scot D

snipp

>>
>> It of course takes work, time, and money to make a decent coil. It's 
>> not rocket science but there are pit falls to watch out for and 
>> experience is the best teacher.
>>
>> Take care,
>> Bart
>
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