Kev Posted April 22, 2008 Share Posted April 22, 2008 right i have a cheap westfield jazz bass which im modding up to be a decent bass (its got a good neck n weight so its worth it for me) however the volume controls seem screwed. im guessing it should just be volume, volume, tone? the tone works fine, but the first volume knob does nothing until its completly counterclockwise, where it cuts the neck pickup, and the second volume know again does nothing until fully turned, and then cuts both pickups. whats goin on here?? iv just fitted some lovely fender japan pickups to it, but the problem remains the same wiring, or f***ed up pots?? Quote Link to comment Share on other sites More sharing options...
neepheid Posted April 22, 2008 Share Posted April 22, 2008 Check what kind of pots they are. Linear taper pots (often marked Bxxx, where xxx is the ohm rating of the pot, often 250 or 500 in passive basses) will do this. Make sure you have log or audio taper pots (marked Axxx, as above), they work in the way the human ear expects. Quote Link to comment Share on other sites More sharing options...
Kev Posted April 22, 2008 Author Share Posted April 22, 2008 B500 is what they say, so this is normal? Quote Link to comment Share on other sites More sharing options...
clauster Posted April 22, 2008 Share Posted April 22, 2008 For the vols you want A500 Quote Link to comment Share on other sites More sharing options...
clauster Posted April 22, 2008 Share Posted April 22, 2008 It also sounds like you've got your pots wired in series, so the front one controls the neck and the rear one acts as a master volume. Quote Link to comment Share on other sites More sharing options...
BOD2 Posted April 22, 2008 Share Posted April 22, 2008 The link below shows standard wiring for a 2-pickup volume, volume, tone Jazz bass. [url="http://www.seymourduncan.com/support/wiring-diagrams/schematics.php?schematic=std_jazz_bass"]std jazz wiring[/url] Copy the wiring from this. You can use 500K or 250K audio taper pots. Quote Link to comment Share on other sites More sharing options...
Kev Posted April 22, 2008 Author Share Posted April 22, 2008 okay, so i change those volume pots to a500's, but it will be alrite to leave the tone pot as it is?? Quote Link to comment Share on other sites More sharing options...
clauster Posted April 22, 2008 Share Posted April 22, 2008 If it's working okay, yes. The schematic Bod posted is the standard VVT wiring, so you may need to change the wiring of the vols if the middle pot cuts all sound and not just the bridge pup. Quote Link to comment Share on other sites More sharing options...
Kev Posted April 22, 2008 Author Share Posted April 22, 2008 okay explain this just picked her up n plugged in... the volume pots are workin as they should iv not opened her up or anything since checkin what the pot types are wtf? Quote Link to comment Share on other sites More sharing options...
Merton Posted April 22, 2008 Share Posted April 22, 2008 Dirty pots probably? Quote Link to comment Share on other sites More sharing options...
BOD2 Posted April 23, 2008 Share Posted April 23, 2008 A bad solder joint somewhere, or a stray strand of wire shorting something out ? If you moved the wires to see the pot values or turned the pots slightly then this might have "fixed" the problem. Check all the solder joints for loose or "dry" connections (good solder joints are bright and shiny not dull/grey) and make sure there are no loose wire strands of any debris lying around. You should try to fix this now otherwise it'll likely come back to plague you later ! Quote Link to comment Share on other sites More sharing options...
clauster Posted April 23, 2008 Share Posted April 23, 2008 +1 Quote Link to comment Share on other sites More sharing options...
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