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Determining Coil Distributed Capacitance

October 12th Fact-of-the-Day

The distributed capacitance of a coil can be determined by measuring resonant frequencies with each of two different known values of capacitance added and then solving two simultaneous equations. However, better accuracy results in most cases from plotting 1/f^2 as a function of the added capacitance and then extrapolating the resulting straight line to the x-axis intercept which will be at the value of the coil distributed capacitance. ©2004 Martek International All rights reserved.

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