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Re: Recycled: Measuring Coupling Coefficients
From: Alfred C. Erpel[SMTP:aerpel-at-op-dot-net]
Sent: Thursday, December 04, 1997 5:52 PM
To: Tesla List
Subject: Re: Recycled: Measuring Coupling Coefficients
Ed,
What is the factor "M" in the equation quoted below? Thanks.
Regards,
Alfred
>>"Refer to Terman's
>>Radio Engineers' Handbook. For example, in radio circuits the K factor
>>varies with the frequency because of the variable tuning capacitor.
>>Changing this capacitor changes the operating frequency and changes the
>>coupling. "
>>Refer to Terman a bit more carefully. The coupling factor
>>for an inductor is simply M/sqrt(Lp*Ls), no matter what the circuit.
>>If there is coupling through both mutual capacitance AND mutual
>>inductance (not at all the case for Tesla coils) then the effective
>>coupling factor DOES change with the value of the tuning capacitors.
>>Ed