I have a selection of salvaged inductors, and I don't (yet) have an inductance meter.
I would like to know what the inductances are, but I have a problem.
They are numbered with 3 digit numbers - I assume this is in the same format as capacitors and resistors - 2 digits and a number of 0's.
However, what is the "base" value of the inductance?
e.g., I have a "221" inductor:
Is this going to be 220pH, 220µH or 220mH?
Where do they start counting from?
With resistors it's easy enough - it's from 0. With capacitors it starts with pF. What do inductors with this kind of numbering system start from?