Capacitance of a cylinder coil

• To: "'Tesla List'" <tesla-at-pupman-dot-com>
• Subject: Capacitance of a cylinder coil
• From: Tesla List <tesla-at-stic-dot-net>
• Date: Wed, 8 Apr 1998 08:03:56 -0500
• Approved: tesla-at-stic-dot-net

----------
From:  Jim Lux [SMTP:jimlux-at-earthlink-dot-net]
Sent:  Tuesday, April 07, 1998 2:51 PM
To:  Tesla List
Subject:  Re: Capacitance of a cylinder coil



> 
> 
> ----------
> From:  Antonio C. M. de Queiroz [SMTP:acmq-at-compuland-dot-com.br]
> Sent:  Monday, April 06, 1998 6:18 PM
> To:  Tesla List
> Subject:  Re: Capacitance of a cylinder coil
> 
> Erik wrote:
> 
> > Self Capacitance of an air core coil
> > Medhurst formula
> 
> Try also this, due to Medhurst too:
> 
> C=11.26*length+16*radius+76.4*radius^(3/2)/length^(1/2) pF
> 
> Distances in meters. Note that the number of turns doesn't appear.
> 
Antonio,

Is that for a closewound or a spacewound coil? I assume it is some sort of
empirical curve fit to the tabular data, much as the Wheeler equations are
an empirical fit to inductance data.

 Antonio Carlos M. de Queiroz
> http://www.coe.ufrj.br/~acmq
> 
> 

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