I have an idea for a wiring mod for my 80's Squire Bullet. It is now the same set up as a Strat but w/ only one tone control. I would like to replace the neck PU w/ another reverse wound mid PU and have it by-pass the 5-way for it's own dedicated vol pot. then straight to the output jack (yes, this PU would always be on). Of course I would no longer have use for #4 and 5 switch positions BUT, by my unskilled reconing there would be 5 hum cancelling pickup configurations and 1 that does not cancel (mid only). I've been told this would be very intricate, but it seems so simple in my non-electronic reasoning. Thoughts, comments, or has it been done already?
By my unskilled reckoning =p I don't think you could bypass the 5 way switch?Maybe go hot wire to volume pot, then wire from there to 5 way switch, but all you are doing is using two wires instead of one.
RW/RP is always with reference to another pickup, so having 2 pickups as RW/RP effectively means only the third is RW/RP. By putting the neck pu on its on volume, you would get all 7 parallel combinations of pickups, but any single, neck/mid and to some extent neck/mid/bridge would not be hum-cancelling. If you want a particular combination to be hum-cancelling you just have to move the pickups around.
Pete is right, as usual, as far as using a RWRP pickup in the neck position, the only 2 humbucking choices would be B+N and B+M.
As far as why you would want this configuration, I leave that up to you. Most folks want to do this sort of thing to the bridge pickup.
IMHO, you would be better off using a "solo switch" on the neck pickup. This would have several advantages over your proposal. First, with the switch in one position, you would have std operation of your 5-way switch, and the ability (in positions 4 and 5) to have the neck pup off. If you really truly want the neck always on, just leave the solo switch on at all times. It would not be a true "solo switch" since it would be wired to a dedicated volume pot for the neck, but the idea is similar.
Wolf's website has a design for this sort of thing which could be modified:
You would wire the switch upstream of the 5 way on the neck pickup leads, one side would go back into your 5 way just as the neck pickup does now, the other side of the switch would go to the neck vol pot and thence to the output jack.
BTW, if you haven't already done so, Wolf's site offers a great primer on wiring of guitars, should be required reading for guitar modders. (Unsolicited plug!)
Thanks for the input. I was just hoping that because the neck pickup is (or would be) RW, it would cancell hum any time the bridge pickup is on, even if the neck pickup volume is down around 1. I just wanted no-hum situations for positions 1 (B), 2 (B+M, which i know is already no-hum), and (B+N). Positions 1, 2, and 5 are what I use most often, beyond that I would normally switch to a different guitar. I did look @ Wolf's diagrams but it doesn't seem to be what I'm after. I also want to avoid cutting any new holes in a 25 yr old axe. Thanks again, Walker
I also want to avoid cutting any new holes in a 25 yr old axe
Push/pull pot could avoid that.
As to whether you would get any appreciable hum cancellation on the bridge w/ a RWRP neck with the neck vol. turned way down, I'm not sure on that. One of the resident experts will need to field that one.
As to B+M and B+N, putting the RW/RP pickup in the bridge position would make these hum-cancelling, at the expense of making N+M not hum cancelling. Unless you use a single coil-sized humbucker in the bridge position, you can't really get any hum cancelling in 'bridge only', because there is no second pickup active to cancel with it.
Last Edit: May 12, 2008 10:49:10 GMT -5 by pete12345
No, little (as in only a little) humcanceling will occur since turning down the volume reduces both the sensed string signal (differential mode signal) and the sensed hum signal (common mode signal).
What makes a series humbucker a humbucker is the in-phase relationship (the signals add) of the two coils to each other regarding the sensed string signal and the out-of-phase relationship (the signals subtract) of the two coils to each other regarding the sensed hum signals.
What makes a parallel humbucker a humbucker is the in-phase relationship (the signals average-in) of the two coils to each other regarding the sensed string signal and the out-of-phase relationship (the signals average-out) of the two coils to each other regarding the sensed hum signals.
I also want to avoid cutting any new holes in a 25 yr old axe.
That's why the pickguard is attached with screws. Unless this is a rear rout body, save the old one and use a new one. No one will care if it's well ventilated.