Secondary Frequency(fwd)

To: "'Tesla List'" <tesla-at-pupman-dot-com>
Subject: Secondary Frequency(fwd)
From: Tesla List <tesla-at-stic-dot-net>
Date: Tue, 18 Aug 1998 23:51:36 -0500
Approved: tesla-at-stic-dot-net


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From:  Mark S. Rzeszotarski, Ph.D. [SMTP:msr7-at-po.cwru.edu]
Sent:  Tuesday, August 18, 1998 3:37 PM
To:  Tesla List
Subject:  Re: Secondary Frequency(fwd)

Reinhard wrote:
>Below are two given coils. 
>What is the frequency of each coil? Another coiler and I disagree on the
>resonant frequency of these two coils. Can somebody help?
>
>Coil A:
>21.7" long
>3" diameter
>Wound with 1230 feet AWG 28
>He says 418kHz (I say 200 kHz)
Ls=25.3 mH
Cdistributed=7.7 pF
Fres=360 kHz (no added topload assumed)
Q=188 -at- 360 kHz
If a toroid with Ctoroid=17 pF is added to the top, Fres=200 kHz (A 5" by
15" would give you about that.)

>Coil B
>10.84" long
>6" diameter
>Also wound with 1230 feet AWG 28
>He says 275kHz (I say 200 kHz)
Ls=41.8 mH
Cs=7.4 pF
Fres=285 kHz (no added topload assumed)
Q=190 -at- 285 kHz
If a toroid with Ctoroid=8 pF is added to the top, Fres=200 kHz (2" by 9"
toroid, approximately).

Regards,
Mark S. Rzeszotarski, Ph.D.