Ground the poles? Ground to cavity shielding?

[rjb]

So what did their engineering staff say about it?

Since it was not their magnet, I didn't contact them.

FWIW, this was the magnet in question- from an old Electromuse Eye-Beam lapsteel pickup:

[David Schwab]

Just stick a piece of copper adhesive shielding tape to the magnet, and solder to the copper tape.

[rjb]

Just stick a piece of copper adhesive shielding tape to the magnet, and solder to the copper tape.

Yes, that would have worked- except the only copper tape I had on hand has non-conductive adhesive.
-rb

[David Schwab]

Yes, that would have worked- except the only copper tape I had on hand has non-conductive adhesive.
-rb

Try it though. I had been using some that doesn't and it still works.

[rjb]

Try it though. I had been using some that doesn't and it still works.

I'll try it on a future project. This one is done
-rb.