obtaining frequency of coil

[LaserTazerPhaser]

Is it as simple as sweeping a coil with sines with an arbitrary generator while the scope is across the coil on FFT mode?

[amyk]

Explain in more detail what you mean by "obtaining frequency" - inductance?

[Whales]

N.B. a coil on its own tends not to have any (useful) frequency response, unless you are hunting for things caused by the interactions of inductance with internal parasitic capacitances.  Are you intending to use it with a capacitor to make an LC circuit?

> Is it as simple as sweeping a coil with sines with an arbitrary generator while the scope is across the coil on FFT mode?

I believe so, just make sure your scope is measuring something useful (eg current into the LC circuit) and ensure that you are aware of whether or not your siggen changes amplitude when you change frequency (depends on the design/quality/age).

[Simon]

If you are looking at the self resonance i think you just need to give it a pulse and see what frequency  it oscillates at.

[LaserTazerPhaser]

This is to obtain coils LC or SRF frequency were capacity is coils parasitic capacitance. The issue is probing it without a resistor which lowers Q offsetting frequency.

[Simon]

well if you drive a square wave through it you should see peak signal strength at the resonant frequency.

[alsetalokin4017]

And if you look at the completely on-topic and ad-free videos I linked in my mysteriously disappeared post you will see some examples of same.

[LaserTazerPhaser]

Greatly appreciated to the mods who removed the offending new age trash off this topic in the form of youtube videos. Same user of posted youtube videos reports on free energy and overunity. https://overunity.com/profile/tinselkoala.13644/

If you are looking at the self resonance i think you just need to give it a pulse and see what frequency  it oscillates at.

Mutual inductance should make this simple for exposed coils. For ferrites and high permabile xfmr wound parts it needs to be directly probed.