angry_jeremy Posted September 17, 2005 Report Share Posted September 17, 2005 I've got a Strat with a DiMarzio hot rail type p/u in the bridge and generic p/u's everywhere else. When I switch to the Middle+Bridge position the sound is quite a bit weaker than the other 4 (I know it's usually quieter but it's more than normal). As far as I can tell from schematics the wiring is correct. The HB has a coil tap on it but the weakness in the sound doesn't change. Any ideas? Quote Link to comment Share on other sites More sharing options...
JohnH Posted September 17, 2005 Report Share Posted September 17, 2005 Could it be out of phase? - ie low volume, very little bass with mainly high harmonics? John Quote Link to comment Share on other sites More sharing options...
angry_jeremy Posted September 18, 2005 Author Report Share Posted September 18, 2005 Hmm...could be, I'll have to go home to check. If so, how do I fix that? Quote Link to comment Share on other sites More sharing options...
Hunter Posted September 18, 2005 Report Share Posted September 18, 2005 You could also adjust the pickup height... But if it's only that position, I don't think that could be it. Check it out, that might be the problem. Quote Link to comment Share on other sites More sharing options...
JohnH Posted September 18, 2005 Report Share Posted September 18, 2005 Hmm...could be, I'll have to go home to check. If so, how do I fix that? ← To fix a phase problem, you need to swap some wires either in the bridge pup or in both the others. Will need to see your wiring diagram and wiring colours to advise further. Would you happen to have an analogue multimeter (ie with a needle)? If so, heres a definative 'pull - off' test for a phase problem: Set it to the most sensitive dc volt setting - eg 0.25V Plug in a guitar lead, but dont plug into amp, instead, connect the meter between jack sleeve and jack tip. Set vol and tones to max. Pick each single pup in turn with the selector switch Put a scredriver tip on one of the pup pole pieces, and then pull it straight up The needle will move either left of right For in phase settings, the needle should move the same way for all pups (doesnt matter which way) You can check again with the problem combo setting - whether you do it on the mid or bridge the needle should move the same way. If you have movement in different directions, a phase problem is indicated. John Place the tip a Quote Link to comment Share on other sites More sharing options...
angry_jeremy Posted September 18, 2005 Author Report Share Posted September 18, 2005 Sounds like the phase issue is the right thing. The bass is very weak on that setting. The neck+middle position works fine. What wires do I need to swap coming from the bridge pickup? Quote Link to comment Share on other sites More sharing options...
JohnH Posted September 19, 2005 Report Share Posted September 19, 2005 (edited) Sounds like the phase issue is the right thing. The bass is very weak on that setting. The neck+middle position works fine. What wires do I need to swap coming from the bridge pickup? ← If the bridge pup sounds OK on its own in whatever coil cut, series etc settings you have, then you can fix it if you know which wires go with each coil. Basically, swap the north coil wires with each other, and swap the south coil wires with each other. that will reverse everything on the bridge, which wont change its own sound but phase swap it with the other pups. If that does not work, thats where we need to know how you have wired it, and what wiring colours you have - also what type of pickup is it? Do you have a diagram? John Edited September 19, 2005 by JohnH Quote Link to comment Share on other sites More sharing options...
angry_jeremy Posted September 19, 2005 Author Report Share Posted September 19, 2005 It's a DiMarzio hot rails, maybe. A HB that fits in the SC hole with 2 blade pole pieces. A specific wiring diagram I don't have, I just follow the strat wiring in a book I have and then looked on the DiMarzio site for what wires to use in the coil cut. Quote Link to comment Share on other sites More sharing options...
JohnH Posted September 21, 2005 Report Share Posted September 21, 2005 It's a DiMarzio hot rails, maybe. A HB that fits in the SC hole with 2 blade pole pieces. A specific wiring diagram I don't have, I just follow the strat wiring in a book I have and then looked on the DiMarzio site for what wires to use in the coil cut. ← i had a look at the Dimarzio diagram here: http://www.dimarzio.com/media/diagrams/4Conductor.pdf It looks like if you have wired that coil cut diagram, then just swap the red and green wires, leaving the switch the same. See if that works, and let us know! John Quote Link to comment Share on other sites More sharing options...
angry_jeremy Posted September 21, 2005 Author Report Share Posted September 21, 2005 Will do! Quote Link to comment Share on other sites More sharing options...
angry_jeremy Posted November 2, 2005 Author Report Share Posted November 2, 2005 Finally got around to re-wiring the beast (I was waiting for the StewMac shielding kit to come in). Problem solved, thanks! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.