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11-26-2008, 09:52 PM
|  | Registered User
Endorsing Artist: Aguilar Amplification, Mike Lull, Gruv Gear | | Join Date: Feb 2006 Location: California | | | What could I be doing wrong with my Jazz Bass Build???? Please help.
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Thanks in advance! 
First off- I though I had all the tools that would make for an aweseom sounding bass with not alot of effort.
One Piece swamp ash body - tung oil finish
Maple neck block inlays
(both from warmoth)
Nordstrand NJ4SV pickups
I figured I'd leave this one passive , vol/vo/tone
I was told that wiring for these pups is white = + black and gray connect together and are attached to the vol pot casing.
prob 1. is that there is a HUGE difference in vol between neck and bridge pup. neck is very very quite. not even a noticable difference when I turn it up or down.
prob 2. although these are supposed to be hum cancelling I still get noise when my hand isn't on the bass strings or bridge. for all the shielding, re shielding I've done...still noise.
This thinkg should thump and growl...doesn't even snarl. What could I be doing wrong? 
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11-26-2008, 10:02 PM
| | Registered User | | Join Date: May 2005 Location: Glendale, AZ | | | Pretty sure your wiring is incorrect. The case is where you solder the grounds. What did you solder to the tabs on the pot? Did you ground the bridge?
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11-26-2008, 10:04 PM
|  | Registered User | | Join Date: Oct 2008 Location: Metro Detroit | | | If you post a pic of your wiring, it will be easier for someone to diagnose the problem. |
11-26-2008, 10:06 PM
| | Registered User
Endorsing Artist: Aguilar Amplification, Mike Lull, Gruv Gear | | Join Date: Feb 2006 Location: California | | Quote:
Originally Posted by BadB  Pretty sure your wiring is incorrect. The case is where you solder the grounds. What did you solder to the tabs on the pot? Did you ground the bridge? | i was told by Brian at Bestbassgear (a guy who has been a great resource - please dont get me wrong) that the gray and black get connected and soldered together.
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"When the end comes for you, let if find you conquering a new mountain, not sliding down an old one." - Jim Rohn
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11-26-2008, 10:08 PM
| | Registered User | | Join Date: May 2005 Location: Glendale, AZ | | | Two wire single coil?
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11-26-2008, 10:10 PM
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Endorsing Artist: Aguilar Amplification, Mike Lull, Gruv Gear | | Join Date: Feb 2006 Location: California | | Quote:
Originally Posted by BadB Two wire single coil? | split coil
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"When the end comes for you, let if find you conquering a new mountain, not sliding down an old one." - Jim Rohn
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11-26-2008, 10:13 PM
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Endorsing Artist: Aguilar Amplification, Mike Lull, Gruv Gear | | Join Date: Feb 2006 Location: California | | Quote:
Originally Posted by Craig_S If you post a pic of your wiring, it will be easier for someone to diagnose the problem. | 
I realize the soldering look crazy but this is after solder, unsolder, re-solder, etc.. :-(
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"When the end comes for you, let if find you conquering a new mountain, not sliding down an old one." - Jim Rohn
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11-26-2008, 10:24 PM
| | Registered User | | Join Date: May 2005 Location: Glendale, AZ | | | Not sure if it would be any different. Singles are wired white to the middle tab on each volume pot. Black grounded to the case on each volume pot. Tab on the right side of each volume pot bent back to the case and soldered to ground. Then the left tab of volume 1 soldered to the left tab of volume 2, which is also soldered to the middle tab of the tone pot, which is soldered to the jack. The right tab on the tone gets the capacitor soldered between it and the case (ground). Bridge wire grounded to case on tone pot. This is standard jazz wiring. Hope it helps, but I am not sure about split coils.
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"If I took my own advice, I'd have no troubles at all!"
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11-26-2008, 10:25 PM
| | Registered User | | Join Date: May 2005 Location: Glendale, AZ | | Quote:
Originally Posted by sonofabass
I realize the soldering look crazy but this is after solder, unsolder, re-solder, etc.. :-( | I can't really see what's going on there.
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11-26-2008, 10:27 PM
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Endorsing Artist: Aguilar Amplification, Mike Lull, Gruv Gear | | Join Date: Feb 2006 Location: California | | | It's wired just as you described actually. - minus that gray wire. I'm amazed that there are no diagrams on the nordstrand site
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"When the end comes for you, let if find you conquering a new mountain, not sliding down an old one." - Jim Rohn
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11-26-2008, 10:30 PM
| | Registered User | | Join Date: May 2005 Location: Glendale, AZ | | | How many and what colors from the neck pickup? How many and what colors from the bridge pickup? Is that other gray wire from the bridge?
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"If I took my own advice, I'd have no troubles at all!"
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11-26-2008, 10:32 PM
| | Registered User
Endorsing Artist: Aguilar Amplification, Mike Lull, Gruv Gear | | Join Date: Feb 2006 Location: California | | Quote:
Originally Posted by BadB How many and what colors from the neck pickup? How many and what colors from the bridge pickup? Is that other gray wire from the bridge? | each pickup has three wires
1 white
1 black
1 gray
the most i've been told is that the black and grray should be connected together.
This thing sounds like CRAP....:-(
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"When the end comes for you, let if find you conquering a new mountain, not sliding down an old one." - Jim Rohn
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11-26-2008, 10:40 PM
| | Registered User | | Join Date: May 2005 Location: Glendale, AZ | | | Man, I am not sure about the gray wire. As for the hum, it sounds like there is a ground problem. Does your shielding extend over the edge of the rout cavity so that it actually touches the control plate? Is there a solid bridge connection to the ground? If you get hum until you touch the strings, there is usually a bridge to ground issue.
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"If I took my own advice, I'd have no troubles at all!"
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11-26-2008, 10:41 PM
| | Registered User | | Join Date: Nov 2008 Location: Miami, FL | | I dont mean to sound ignorant but couldnt you follow one of the wiring diagrams from Seymour Duncan's website? They have a wiring diagram for wiring up 2 passive j pups with a vol/vol/tone control http://www.seymourduncan.com/support...=std_jazz_bass
I admit I dont have any experience whatsoever with Nordstrand pups but I really hope this helps ya out a bit!  Good Luck! |
11-26-2008, 10:43 PM
| | Registered User
Endorsing Artist: Aguilar Amplification, Mike Lull, Gruv Gear | | Join Date: Feb 2006 Location: California | | | I dont know about the gray either. the anwer to your other question is not. the shielding doesnt go over but this still doesn't explain why, even with a little hum that these pickups that are supposed to be so great don't seem to be doing anything other than aggreavating me :-( and I have the flu! how fun is that :-)
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"When the end comes for you, let if find you conquering a new mountain, not sliding down an old one." - Jim Rohn
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11-26-2008, 10:49 PM
| | Registered User | | Join Date: May 2005 Location: Glendale, AZ | | | The seymour duncan wiring schematic for the passive soapbar seems to be the one you're looking for. Make sure that your bridge ground goes to the tone pot case and then to the jack. Is it possible that you overheated the neck volume pot with all of that soldering?
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"If I took my own advice, I'd have no troubles at all!"
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11-26-2008, 10:50 PM
|  | Registered User | | | | | Email Nordstrand....
Mike |
11-26-2008, 10:50 PM
| | Registered User
Endorsing Artist: Aguilar Amplification, Mike Lull, Gruv Gear | | Join Date: Feb 2006 Location: California | | | badB - first of thanks fgor hanging in there with me. 2, re over heating - you could have a point there!
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"When the end comes for you, let if find you conquering a new mountain, not sliding down an old one." - Jim Rohn
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11-26-2008, 10:51 PM
| | Registered User
Endorsing Artist: Aguilar Amplification, Mike Lull, Gruv Gear | | Join Date: Feb 2006 Location: California | | BUT - the pickups didn't sound "good" before, hence the soldering, resoldering...I'm confused 
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"When the end comes for you, let if find you conquering a new mountain, not sliding down an old one." - Jim Rohn
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11-26-2008, 10:52 PM
| | Registered User
Endorsing Artist: Aguilar Amplification, Mike Lull, Gruv Gear | | Join Date: Feb 2006 Location: California | | Quote:
Originally Posted by keyboardguy Email Nordstrand....
Mike | cuz I'm trying to get some progress made tonight...not wait all weekend. but thanks mike
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"When the end comes for you, let if find you conquering a new mountain, not sliding down an old one." - Jim Rohn
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