Hello chaps. This is a question for guitar techs. I've got an old Mighty mite humbucker from about 1978 that I wish to fit to an Epiphone les paul. I do not want coil split on it, just humbucking. The wire colours are black, white, red and a shield/ earth.Does anyone know which is which? One end of the pickup is linked (Red), the black comes from the other end of one coil and the white from the other coil. Which is hot and which do I connect together to ground? Thanks for your help in advance.
Don't know much but I once had a Mighty Mite MB pickup that I fitted to a few guitars, and set up without using the coil tap.
Get yourself a multimeter or borrow one. Find the wire that give the highest reading in K ohms when the other end of the meter is connected to the ground(earth) . That is the highest output. Maybe youll have to wind two wires toghether to give the highest reading too.
Seem to remember that this pickups full output was with the green wire to hot, and the other two linked together. Plus the earth to ground.
If a manufacturer cannot settle on a standard wiring colour scheme then draw your own conclusion. It's not even easy to find out from the overblown Mighty Mite website.
As Andy says, ring it out. The screen is obviously at ground potential with respect to the instrument wiring. That leaves three conductors. Dependable pick up manufacturers would have four conductors and screen. The four conductors would connect, two each to the slug coil and the screw coil. You only have three which reduces your combinations / head scratching. Mighty Mite probably value engineer the screen as one of the coil wires.
Having rung it out as Andy suggested, there can only be a couple of usable permutations at most. Leave the pots and other pick up switch wiring disconnected until you are happy with the arrangement. I like to crocodile clip the leads two at a time to a jack plug and gently tap the magnets with something ferrous such as a steel rule with the amplifier turned down low. You'll soon see which ones sound acceptable. If you have a multi meter hooked up on the appropriate kilo-ohm range, as you bring a ferrous article close to the magnets, you'll see the reading dip which lets you know the magnetic polarity. I'm afraid that I cannot remember which is which though! I mention this because if you already have another pick up from a different manufacturer in the guitar then you need to be aware of phase problems. It shouldn't take too much time to google the answer to that.
You cannot do any damage by hooking up the wires incorrectly so dive in.
BTW; don't forget to insulate the unused conductors ;<D
Cheers for that folks. I took this pickup out of my old Microfrets years ago, so can't remember for the life of me how it was connected, but I seem to recall it sounded good. Thanks very much for the help, it wiil be sorted tomorrow (as soon as I sober up!)