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[Omega_0]

- many other factors -- can't think of any that would substantially alter the result, other than the above.

Skin effect comes to mind. A normal resistor is not frequency independent, resistance increases with frequency due to skin effect. So the resistance should be measured at operating frequency.

I know that you have taken a good care in measuring resistance here, but the whole game depends on resistance value. Although the resistance at which OU disappears is double the measured value, the absolute value is very very small. Smaller the value bigger the error.

I will wait for probe readings, please do post the excel sheets. Meanwhile I'm trying to find a way to exploit the excess energy, if its really there.

I'd also like to see the Rin vs Eo plot at sweetest frequency. Lets see how big the Rin can go roughly. Bigger Rin means more reliable measurements.

[Omega_0]

The problem with your setup is not the way you measure it, its how you understand impedance with a inductor. You expect Rprimary to be a static value when its not, the value change as the frequency change, the formula is : 2 * Pi * F * L . F is the frequency in Hertz and L is the inductance value in Henry.

Just to make it more clear for other readers, this formula is for reactance of the coil, and reactance does not consume any power. It only limits the current, the real power dissipation is always resistive.

A little power also goes as stored magnetic field of the inductor (0.5*L*I^2), but it is not consumed, it returns back to the source after each cycle.

[IceStorm]

@IceStorm,

While I agree with you about the inductance of the coil, I do not agree with respect to the active resistance of a coil. The active resistance of a coil is not a function of frequency (inductance is). The fact that impedance of the coil changes with frequency (because of inductance changing with frequency) in no way affects the results I'm presenting. Once the active resistance of the coil is correctly measured all remains as already presented.

You should learn a bit more in electronic before seek a OU effect, The resistance of the coil dont mean anything , its the resistance of the wire , its only useful if you pass DC on it , so 0 hertz. Its basic electronic lol the reactance change as the frequency change, its why the Rprimary is not a static number.Dont argue pls until you make a simple search on inductor impedance, its a bit a waste of time continuing this discussion on a very well know fact even if you denied it.Its really basic electronic, there no magic here.


Edit: The inductance doesnt change with the frequency, a 2mH coil is still a 2mH coil at 1Mhz unless you affect the Core by moving it or passing a Magnet near it.

[IceStorm]

Just to make it more clear for other readers, this formula is for reactance of the coil, and reactance does not consume any power. It only limits the current, the real power dissipation is always resistive.

A little power also goes as stored magnetic field of the inductor (0.5*L*I^2), but it is not consumed, it returns back to the source after each cycle.

The reactance is the impedance of the coil , so affect Rprimary since ITS NOT A DC SIGNAL. Rprimary as draw in the schematic he showed is Rprimary = XL

[IceStorm]

Here a simple link about impedance , hope you learn someting

http://artsites.ucsc.edu/EMS/music/tech_background/Z/impedance.html

Best Regards,
IceStorm