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Post by aquin43 on Sept 17, 2020 8:22:14 GMT -5
The plated steel pole pieces on most humbuckers and cheaper strat pickups with bar magnets below the coil seem to be a major cause of loss of Q. There is a grade of stainless steel, 430FR that is magnetic and is used for solenoid cores. It has a resistivity about 4.6 times higher than mild steel and quite high permeability. It might allow a strat pickup with adjustable poles and high Q to be made.
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Post by JohnH on Sept 17, 2020 15:33:56 GMT -5
I was about to jump in and expound about 'stainless steel isn't magnetic!...." etc. Then I noticed that it was posted by you who knows about this stuff, hmm that's interesting!
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Post by b4nj0 on Sept 17, 2020 18:14:35 GMT -5
High carbon stainless-steel. Better for knife edges than the non-ferrous variety. I'm not sure what the benefits for pickups are though.
e&oe ...
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Post by ms on Sept 21, 2020 7:00:15 GMT -5
The plated steel pole pieces on most humbuckers and cheaper strat pickups with bar magnets below the coil seem to be a major cause of loss of Q. There is a grade of stainless steel, 430FR that is magnetic and is used for solenoid cores. It has a resistivity about 4.6 times higher than mild steel and quite high permeability. It might allow a strat pickup with adjustable poles and high Q to be made.
The magnetic and electrical properties look great. I looked around a bit for screws made from it and did not find anything. It is machinable, and so maybe you could cut a thread on a rod for adjustability. But maybe chemical and/or heat treatment is necessary afterwards. That might be a problem. |
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