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Works with literally almost any Inductor Value!!!
This is a special LC oscillator that uses a fixed value Capacitor, and an Amplifier I specifically designed to have a 0° phase shift so that a very wide variety of inductors may be used to calculate unknown inductance values by using an oscilloscope to measure the frequency of oscillations and plug that into an LC resonant formula to find the value of the unknown inductor.
This circuit will work with literally almost any Inductor value you wanna throw at it, from less than 1nH up to even 1 Henry or more.
*Do note though, you may have to increase the base capacitor for extremely large inductors, and this circuit may produce undesirable secondary frequencies if the emitter tank circuit amplitude becomes too large, at which you can most likely still be able to determine the true Resonant Frequency by using your oscilloscope to measure the width (in seconds) of the shortest 1/2wavelength and simply calculating the reciprocal prior to plugging in the frequency to the inductor equation shown below.
***First dial in the expected Resonant frequency using the sine wave generator, and then SHAKE TO START, or wait very patiently, and observe the oscillations!***
THE FORMULA:
Normal: f = 1 / (2π √LC)
Solving for Inductance: L = 1 / (4π2 f2 C)
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