Workbench Posted February 1, 2005 Report Share Posted February 1, 2005 Hello, I just got this site reccomended to me by a pal over at Aron Nelsons stompbox forum. Anyway, i just addded a middle humbucker to an Ibanez CN250, which has two humbuckers already. So I wired up the third pickup with all 3 going to seperate vol. controls and one tone pot. The middle pickup seems to be sucking tone from the other two pickups, but when I turn it down the other two come to life. Any ideas on what is going wrong? Thanks! Chris Quote Link to comment Share on other sites More sharing options...
lovekraft Posted February 1, 2005 Report Share Posted February 1, 2005 Do you have a wiring diagram so we can see what you've done? Quote Link to comment Share on other sites More sharing options...
Workbench Posted February 1, 2005 Author Report Share Posted February 1, 2005 Here at Guitarelectronics.com WDU-HHH3T22-01 Quote Link to comment Share on other sites More sharing options...
lovekraft Posted February 1, 2005 Report Share Posted February 1, 2005 OK, but if that's what you did, you wouldn't be having problems, because that circuit works without issues. We need to know specifically what you did if we're going to solve your problem without just guessing. Quote Link to comment Share on other sites More sharing options...
Workbench Posted February 1, 2005 Author Report Share Posted February 1, 2005 I used the two old volume pots for the pre-existing pups, and one of the old tone pots for the new pup. I would imagine that the volume pots were 250k and the tone pot was 500k, and that is why I had the issues. when I turned the new pup pup pot down just a little, it shut the pup off entirely, and the original two pups got much louder. I just ordered 3 250k pots for the volumes and one 500k for the tone, and will hook it up with those when they come. That should solve the problem, if not.....? Chris Quote Link to comment Share on other sites More sharing options...
thomasteven Posted February 1, 2005 Report Share Posted February 1, 2005 Tone pots don't matter so much as to what the rating is. All it does is shunt the treble frequencies to ground acording to how far the pot is turned. Don't get me wrong, it will make a difference, but not a whole lot. Quote Link to comment Share on other sites More sharing options...
lovekraft Posted February 2, 2005 Report Share Posted February 2, 2005 You've found your problem! There's no way to use 3 randomly mismatched volume pots in a passive system without having strange interactions. Good job figuring it out! Quote Link to comment Share on other sites More sharing options...
Saber Posted February 2, 2005 Report Share Posted February 2, 2005 I used the two old volume pots for the pre-existing pups, and one of the old tone pots for the new pup. I would imagine that the volume pots were 250k and the tone pot was 500k, and that is why I had the issues. when I turned the new pup pup pot down just a little, it shut the pup off entirely, and the original two pups got much louder. I just ordered 3 250k pots for the volumes and one 500k for the tone, and will hook it up with those when they come. That should solve the problem, if not.....? Chris ← If your new middle pickup is a lot lower in resistance/impedance than the other two, it can load the other pickups and reduce their signal output when they're all in parallel. That's another thing to consider. Do you know the coil resistance of each of the three pickups from either their specs or from measuring them with an ohmmeter? Quote Link to comment Share on other sites More sharing options...
Workbench Posted February 3, 2005 Author Report Share Posted February 3, 2005 How do I go about measuring coil resistance? Also, the neck and middle pickups are both Dimarzio super II's and the bridge is a Dimarzio super distortion. I would think they all had similar characteristics, but ya' never know! Anyways, let me know how to measure coil resistance please! And thank you! Chris Quote Link to comment Share on other sites More sharing options...
lovekraft Posted February 3, 2005 Report Share Posted February 3, 2005 Simply measure the resistance between the hot and ground leads with a multimeter. Quote Link to comment Share on other sites More sharing options...
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