freefrog has a lot of this type of knowledge. If he does not see this topic, maybe PM him for his thoughts?
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Question About Base Plates for Single Coils.. .
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I miss the 80's (girls) !!!
Seymour Duncans currently in use - In Les Pauls: Custom(b)/Jazz(n), Distortion(b)/Jazz(n), '59(b)/'59(n) w/A4 mag, P-Rails(b)/P-Rails(n); In a Bullet S-3: P-Rails(b)/stock/Vintage Stack Tele(n); In a Dot: Seth Lover(b)/Seth Lover(n); In a Del Mar: Mag Mic; In a Lead II: Custom Shop Fender X-1(b)
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Gentlemen, that's putting much trust in my geekiness. :-)
I had seen this topic. I've not replied because I had no useful data to share about alloys & thickness of Callaham / Fralin and other "inductance plates".
Now and if generic thoughts have any interest:
-steel baseplates boost a wee bit the inductance and alter a tad the magnetic field, making the resonant peak slightly lower pitched and flatter. Which makes the pickup theoretically warmer. But that's old news that people can find by googling...
-Yep, materials have an influence: a brass baseplate would make the resonance flatter but also and paradoxically higher pitched when measured because of Foucault currents. A copper plated steel plate would flatten the resonance too but would promote only the frequency range under resonant frequency... and so on. But that's not really relevant here, since Callaham / Fralin BP's appear to be made only of steel (whose grade is unknown: a metallurgical analysis would be necessary);
-such added baseplates haven't the same influence according to the lenght and staggering of the rod poles: flat poled single coils seem more sensitive to the presence of a steel baseplate (IME. YMMV). That's maybe the only "useful" thought that I can share here but it makes the effect of inductance plates strongly dependent on the model of pickup used. So I'm still not sure that my rambling is helping. :-P
FWIW. :-)
Duncan user since the 80's...
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Copper-plated steel is also part of what makes the Twangbanger (https://www.seymourduncan.com/single...g-banger-strat) work. You can also buy such plates from various places to test it out; attach them with silicone adhesive to avoid squeal. IIRC, the Twangbanger has a hotter wind."I don't like the real world. I have to live there, and it sucks. It's drab, it's dingy, quality control is a f*cking joke, A-cups are far too prevalent, nobody can fly and all the dinosaurs are dead!" -- The Game Overthinker
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