I'm guessing that you're unfamiliar with the Sencore Z-Meters Ringer Tests.
They're capable of indicating shorted single turns.
Fault-free inductors normally ring 10 rings or higher.

Placing a single turn of wire (with ends touching forming a conductive turn)
around an inductor will generally yield a Fail/1-thru-9 test result.

These testers work reliably for any type of inductor/transformer commonly
used in electronic equipment circuits (no core material or ferrite-type
cores, not steel core types as mentioned previously).

Guitar pickup assemblies aren't typical circuit inductors, however I kinda
expected them to Ring Test normally with the steel screws and cores removed.

--
Cheers,
WB
..............


"Phil Allison" wrote in message
...

"Wild_Bill"
So, I've disassembled another Epiphone humbucker pickup of the same basic
type/series (but instead the neck pickup), and the Ringer Test results
are the same (4 rings whether assembled or disassembled).

Assembled pickup DC resistance 10.8k ohm, inductance 4.7H.

Disassembled pickup, coils separated from magnet, frame plate..
individual coils inductance 2.3H

Bare coils, no screws or core plugs.. 830mH each.


** The number is visible cycles of ringing is a guide to the Q of a
resonant circuit - the Q is approximately equal to the number of cycles.

So, your pickup coil has about a Q of 4 - either bare or assembled.

Why?

The frequency of ringing is much higher when bare.

Q = the ratio of impedance to resistance at a given frequency.



.... Phil