Mystery inductor [SOLVED]

[newbrain]

I'll resort to the collective knowledge of the forum.
I've been given some SMD inductors (see bad phone picture, actual size about 2x2x2mm), but I cannot really read the colour code.

Google is not my friend, I was not able to find any similar inductor.

How many bands am I supposed to see?
Two brown - one black - one silver? 11 * 0.01 = 0.11uH? Or what?

Smashing one confirms that they are actually inductors.

Tonight I'll try to see the LC resonant frequency with a known capacitor...

[Belrmar]

For this kind of stuff the best way to know a value is the LC resonance, if you are looking for a precise value SMD inductors are not the best they usually come with 20% tolerances, so yes. LC FTW

[newbrain]

Thanks,
That's what I plan to do. I also have some with two thin red lines plus the brown one...
It will stay a mystery till tomorrow, though, as I forgot them at work 

Edit: Mysspelling in the thread title

[T3sl4co1l]

91?  221 (for the other)?

Anyone's guess if that's nH, uH or something else.  Coilcraft parts for example are numbered from a variety of decimals, so you have to look at the datasheet (not that the number is normally printed on the part anyway, so you have to measure anything salvaged).

Tim

[newbrain]

Well the are quite small, if they are inductors at all.

With 47nF F_res~=3.6MHz.
So, that would be about 40nH...too close to the self inductance of a few cm of wire to be confident in the result...

[newbrain]

Ok, I made a tighter test rig and got more reasonable results.

They are read from the wide color band, 3 bands only.
Value is in nH.

The one in the photo in the OP is Brown - Gray (or white?) - Black = 18nH
From the first screenshot, still with 47nF ~22nH

The other one Brown - Red - Red = 1200nH
From the second screenshot, 47nF ~ 1300nH

Considering tolerance and parasitic L/C, a good match.