TM1, I've a feeling that it may have been you that responded to my request for an alnico alternative to the highly charged short alnico 5 magnets in my pat# T Top humbuckers.I have around 6 or 7 T-Tops from ‘65-’71! I’ve found the key to them is to replace the magnets with Throbak A-4’s. That, to my ears really sweetens them up. I was told by a reknown pickup maker that the stock magnets in T-Tops were A-2’ & A-5’s and that they were either too strong or too weak, so I just put my fave A-4’s in them and love the way they sound now.. my only problem is that I don’t have enough humbuckered guitars to use them all in...
Whether it was yourself or another member,(And if I'm mistaken TM1, I do apologise..) The recommendation that replacing the short alnico 5 for a long alnico 4 has stayed with me.
The implication is that a long alnico 4 magnet with a moderate charge will provide a tone closer to that of the later pat#PAF humbuckers when placed in an early pat#T Top humbucker.
The suggestion that a change of magnet can revoice a humbucker will inevitably strike some as ridiculous, it is perhaps worth bearing in mind that the induction, gauss and resonant peak of our humbucking pickups is almost entirely dependent on the properties of... The magnet.