Re: choke

• To: tesla-at-pupman-dot-com
• Subject: Re: choke
• From: Skip Malley <skipm-at-bellatlantic-dot-net> (by way of Terry Fritz <twf-at-verinet-dot-com>)
• Date: Thu, 01 Apr 1999 18:30:44 -0700
• Approved: twf-at-verinet-dot-com

For making RF related coils, the last thing you want to do is make anything
with multiple layers.  The layers will have capacitance between them.  At
RF frequencies, this capacitance will eliminate the effect of the having an
inductor.  ANY RF SUPPRESSION SHOULD BE SINGLE LAYER ONLY.!!!!!  10mH
sounds like a lot of inductance, but at Tesla frequencies, it would be the
same as if there were no inductor, maybe worse.

At 07:06 PM 3/31/99 -0700, you wrote:
>Original Poster: Hollmike-at-aol-dot-com 
>
>In a message dated 3/31/99 3:45:30 AM Mountain Standard Time,
tesla-at-pupman-dot-com
>writes:
>
>> Original Poster: Statz People <statz-at-win.bright-dot-net> 
>>  
>>  how would i go about making a couple of 10mh air core chokes for my 15k
>>  transformer?
>>  
>You would design them just like a secondary coil, using the Wheeler equation.
>L(uH) = R^2*N^2/(9*R + 10*B).
>I cranked out two possiblilites using 24g wire.  For a 3 inch diam core, you
>would need 1025 turns and for a 4 inch diameter core, you would need 617
>turns.
>Hope this helps.  
>Mike
> 

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