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: Mon, 6 Apr 1998 00:04:52 -0500
• Approved: tesla-at-stic-dot-net

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From:  ESchulz531 [SMTP:ESchulz531-at-aol-dot-com]
Sent:  Sunday, April 05, 1998 3:07 PM
To:  tesla-at-pupman-dot-com
Subject:  Capacitance of a cylinder coil

Self Capacitance of an air core coil
Medhurst formula

Capacitance (pF) = K * Diam (cm)

where K is an empirical function of Length/Diameter

L/D        K
5.0       0.81
4.5       0.77
4.0       0.72
3.5       0.67
3.0       0.61
2.5       0.56
2.0       0.50
1.5       0.47
1.0       0.46

Summarized from Medhurst in Wireless Engineer V24.281 (Feb 1947) page 35, and
V24.282 (May 1947), p. 80 by Rzeszotarski

This is from http://home.earthlink-dot-net/~jimlux/hv/medhurst.htm

Erik

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