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Re: Self Capacitance formulas
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To: tesla-at-grendel.objinc-dot-com
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Subject: Re: Self Capacitance formulas
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From: Esondrmn-at-aol-dot-com
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Date: Fri, 12 Jan 1996 12:55:11 -0500
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>Received: from emout06.mail.aol-dot-com (emout06.mail.aol-dot-com [198.81.10.43]) by uucp-1.csn-dot-net (8.6.12/8.6.12) with ESMTP id KAA10699 for <tesla-at-grendel.objinc-dot-com>; Fri, 12 Jan 1996 10:55:42 -0700
In a message dated 96-01-11 11:24:58 EST, you write:
>>
>Regarding formula #6 for calculating resonant frequency, that formula
>estimates resonant frequency based on a quarter wavelength of wire alone.
>The resonant frequency of a secondary coil will be lower than that due to
>distributed capacitance (above) and the toroid placed on top. It is more
>accurate to estimate operating frequency using the f=1/(2 x pi x sqrt(L x
>C)) formula, where L is the inductance of a solenoid in henries, and C
>includes the distributed capacitance plus the toroid capacitance, in units
>for Farads. To get a ballpark C value, compute the distributed capacitance
>above and double it. If you use large toroids (good thing if you have
>enough available power), add another 10-30 picofarads to C to take into
>account the capacitance of the large toroid.
>Regards,
>Mark S. Rzeszotarski, Ph.D.
Mark,
Thanks, Ed Sonderman