Amp coils?

[Noplasticrobots]

I pulled some amp coils similair to this:http://tinyurl.com/7lwqb from an old motherboard and I was wondering if I can use them in any audio circuits? Also, what would I measure for to see if they're good?
One is marked •681 N12 and the other is marked •331 N12.

[Paul Perry (Frostwave)]

If you have trouble with a fuzz (or anything else) picking up radio interference, it is worth putting one of these in series with the signal input. You know, when people say "try a ferrite bead".

[niftydog]

coils or inductors... 4 amp rated, not "amp coils." 

Now, I'm no expert, but I'd say what you have there is one 68µH and one 33µH coil.

N is not a tolerance code I've ever encountered, and I have no idea what the 12 would mean. Sorry!

[Noplasticrobots]

When you say in series with the input, does that mean it should be the first thing on the input chain?

[johngreene]

coils or inductors... 4 amp rated, not "amp coils." 

Now, I'm no expert, but I'd say what you have there is one 68µH and one 33µH coil.

N is not a tolerance code I've ever encountered, and I have no idea what the 12 would mean. Sorry!

681 would be 680uH (or nH) I would think. The '1' meaning there's 1 zero following the 68.

--john

[niftydog]

sorry, brain fade. Yes, you're right johngreene

680µH and 330µH.