Picked this up on ebay recently. I know it's a Filtertron, but not much else. I assume 70's Baldwin era? Would this have a ceramic magnet? The resistance is just shy of 8k. I've added a "hillbilly humbucker" mounting to the bottom, but haven't installed it in a guitar yet. That base plate was just loose....
Yep that's a Baldwin Filter. I think they were all ceramic, but I'm no expert.
I have a Baldwin era Supertron. It read only 4.2K but the magnet was ceramic. I swapped the magnet out for alnico and it's set aside for some future project. I plan to use it in at the neck of some guitar some day.
But if yours is 8K I bet it would sound awesome with an alnico magnet (if it doesn't have one already). Probably very Powertron-ish. Looks like you might even be able to coil tap it with those extra wires coming out of it.
That might be a little newer than a Baldwin era Tron.
The ones I've had the brass base plate had radius corners to fit the cover and black bobbins. Also the added English mount bar of alumn. with tapped holes. Which yours is clearly missing but was there, evident of the brass plate discoloration/oxidation across the middle.
