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  • #134566
    Jeff Preston
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    <p style=”text-align: left;”>

    It’s either grounded of or it isn’t. The brand of caps and pots will make no difference on 60 cycle hum. Shielding tape / paint is your answer although single coil pickups are going to do that. By comparison, my JB is no worse than my 73′ J bass. Might actually be a little quieter when 1 pot is rolled back.

    Gotta figure out how to see if it’s grounded. I added copper foil in all of the places. Didn’t make any difference in the noise.</p>

    JP
    G&L USA JB, FrankenJazzuar, Hartke 210 Combo, Darkglass B7K Ultra, Boss GT-1B, SansAmp Programmable BDDI, EBS Fuzzmo

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    #134577
    Andyman001
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    Still a lot of ground noise

    Does noise go away when you touch strings/ bridge?

    Mostly, yes.

    How do I check if it’s grounded properly? I put copper foil in the pup and control cavities and even did the bridge ground fix from bassesbyleo.com

    Noise going away when you touch the strings/ bridge/ control plate, tells me that it is wired correctly. is all the shielding connected electrically?

    measuring any 2 points with an ohmmeter, or DMM, should be close to ohms resistance.

     

    Playing bass for 35 years, taking time out for meals, of course

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    #134584
    Jeff Preston
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    Still a lot of ground noise

    Does noise go away when you touch strings/ bridge?

    Mostly, yes.

    How do I check if it’s grounded properly? I put copper foil in the pup and control cavities and even did the bridge ground fix from bassesbyleo.com

    Noise going away when you touch the strings/ bridge/ control plate, tells me that it is wired correctly. is all the shielding connected electrically?

    measuring any 2 points with an ohmmeter, or DMM, should be close to ohms resistance.

    So, just add some solder at each spot where the tape overlaps? I suppose I can put beads like Boney did if I have to😂. Gotta quiet the beast down!

    JP
    G&L USA JB, FrankenJazzuar, Hartke 210 Combo, Darkglass B7K Ultra, Boss GT-1B, SansAmp Programmable BDDI, EBS Fuzzmo

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    #134597
    Andyman001
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    Still a lot of ground noise

    Does noise go away when you touch strings/ bridge?

    Mostly, yes.

    How do I check if it’s grounded properly? I put copper foil in the pup and control cavities and even did the bridge ground fix from bassesbyleo.com

    Noise going away when you touch the strings/ bridge/ control plate, tells me that it is wired correctly. is all the shielding connected electrically?

    measuring any 2 points with an ohmmeter, or DMM, should be close to ohms resistance.

    So, just add some solder at each spot where the tape overlaps? I suppose I can put beads like Boney did if I have to😂. Gotta quiet the beast down!

    I did that with my MIM Jazz 5, also.

    I also left little “tabs” that fold up over the top to make contact with the control plate & pick guard.

    Playing bass for 35 years, taking time out for meals, of course

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    #134601
    bonin in the boneyard
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    So, just add some solder at each spot where the tape overlaps? I suppose I can put beads like Boney did if I have to😂. Gotta quiet the beast down!

    You don’t need the whole bead.  A couple dots here and there will do.

     

    I also left little “tabs” that fold up over the top to make contact with the control plate & pick guard.

    This is good practice as well.

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    #134608
    Jeff Preston
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    So, just add some solder at each spot where the tape overlaps? I suppose I can put beads like Boney did if I have to😂. Gotta quiet the beast down!

    You don’t need the whole bead. A couple dots here and there will do.

    I also left little “tabs” that fold up over the top to make contact with the control plate & pick guard.

    This is good practice as well.

    Ok. I already left tabs. Will try to solder the tape joints when I get a chance.
    Icing the knee right now. Did too much yesterday and this morning.

    JP
    G&L USA JB, FrankenJazzuar, Hartke 210 Combo, Darkglass B7K Ultra, Boss GT-1B, SansAmp Programmable BDDI, EBS Fuzzmo

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    #134609
    bonin in the boneyard
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    Yoga is supposed to be be good for that.

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    #134612
    fcleff69
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    Yoga is supposed to be be good for that.

    Lol

    The Coberator. My other car is a Rocinante.

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    #134690
    Jeff Preston
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    Put some dots of solder at various joints of the tape and the noise is greatly reduced. Not dead silent, but I didn’t expect SCs to be.

    I think it’s good to go now!

    Soon as I get my recording skills together, I’ll do a little video à la cHefCleff who has a sweet new SB-1.

    JP
    G&L USA JB, FrankenJazzuar, Hartke 210 Combo, Darkglass B7K Ultra, Boss GT-1B, SansAmp Programmable BDDI, EBS Fuzzmo

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    #134864
    Jim C
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    Put some dots of solder at various joints of the tape and the noise is greatly reduced. Not dead silent, but I didn’t expect SCs to be.

    I think it’s good to go now!

    Soon as I get my recording skills together, I’ll do a little video à la cHefCleff who has a sweet new SB-1.

    You probably know this but the copper foil needs to be attached to ground at all locations as well as a wire under the bridge to ground.

    Soldering the seems in the copper is cool but I have not found it to be that big a deal assuming you burnished the overlap conditions on the copper. Unless you bought 3M brand, the adhesive is not conductive although using a pop cycle stick to make sure there is a good physical connection at the tap joints typically gives you a nice low impedance connection.

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    #134876
    Jeff Preston
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    Put some dots of solder at various joints of the tape and the noise is greatly reduced. Not dead silent, but I didn’t expect SCs to be.

    I think it’s good to go now!

    Soon as I get my recording skills together, I’ll do a little video à la cHefCleff who has a sweet new SB-1.

    You probably know this but the copper foil needs to be attached to ground at all locations as well as a wire under the bridge to ground.

    Soldering the seems in the copper is cool but I have not found it to be that big a deal assuming you burnished the overlap conditions on the copper. Unless you bought 3M brand, the adhesive is not conductive although using a pop cycle stick to make sure there is a good physical connection at the tap joints typically gives you a nice low impedance connection.

    I didn’t use 3M and didn’t burnish the edges. The solder dots seem to have reduced the noise significantly. I guess I should run a wire from the pup cavities to the control cavity and solder them to the foil since they don’t connect to the actual cavity for further noise reduction.

    As I’m sure you can tell, I have no idea what I’m doing with this electrical stuff.

    JP
    G&L USA JB, FrankenJazzuar, Hartke 210 Combo, Darkglass B7K Ultra, Boss GT-1B, SansAmp Programmable BDDI, EBS Fuzzmo

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    #134899
    bonin in the boneyard
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    Sounds like you’re on the right track, though!

    Best practice for ground is to make a “star” configuration.  All the grounds should connect at one point, and connect that to the jack.  That will tend to work better than daisy chains or loops.

    So for example, pick the housing of the pot closest to the jack.  Run a wire from there to the middle of the copper shielding the cavity, another wire to the bridge, another wire to the middle copper (if any) shielding the pickup cavities, and the wire to the bridge, etc.

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    #134904
    Jeff Preston
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    Sounds like you’re on the right track, though!

    Best practice for ground is to make a “star” configuration. All the grounds should connect at one point, and connect that to the jack. That will tend to work better than daisy chains or loops.

    So for example, pick the housing of the pot closest to the jack. Run a wire from there to the middle of the copper shielding the cavity, another wire to the bridge, another wire to the middle copper (if any) shielding the pickup cavities, and the wire to the bridge, etc.

    Here is a pic of the controls I installed.
    C51A9DAC-F062-4DD0-B1A7-0101F3C1DB82

    All of the ground wires come off of the Master Volume pot solder lug. There’s a connection for each individual pup and one for the bridge ground wire. Do I still need something going directly to the copper foil?

     

     

    JP
    G&L USA JB, FrankenJazzuar, Hartke 210 Combo, Darkglass B7K Ultra, Boss GT-1B, SansAmp Programmable BDDI, EBS Fuzzmo

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    #134908
    bonin in the boneyard
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    That looks great!

    Do I still need something going directly to the copper foil?

    Yes, ideally, you should ground shielding as well.

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    #134911
    Jeff Preston
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    That looks great!

    Do I still need something going directly to the copper foil?

    Yes, ideally, you should ground shielding as well.

    So, add a wire from the shielding in each pup cavity to the control cavity shielding and then one from the bottom of a pot to the control cavity shielding?

    JP
    G&L USA JB, FrankenJazzuar, Hartke 210 Combo, Darkglass B7K Ultra, Boss GT-1B, SansAmp Programmable BDDI, EBS Fuzzmo

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    #134916
    bonin in the boneyard
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    The master volume lug where your grounds go now is the center of your star, so no need to change that.

    You would want to add a wire from the middle of each or your cavity shields (pup and control cavities) to the center of your star.

    That would work better than daisy chaining from a pup cavity to the control cavity and then to the center of your star.

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    #134919
    Jeff Preston
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    The master volume lug where your grounds go now is the center of your star, so no need to change that.

    You would want to add a wire from the middle of each or your cavity shields (pup and control cavities) to the center of your star.

    That would work better than daisy chaining from a pup cavity to the control cavity and then to the center of your star.

    Copy that. I’ll give it a try and see what happens.

    JP
    G&L USA JB, FrankenJazzuar, Hartke 210 Combo, Darkglass B7K Ultra, Boss GT-1B, SansAmp Programmable BDDI, EBS Fuzzmo

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    #134941
    Jeff Preston
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    Well, I tried that and now all I get is a little buzz out of the controls. No sound from the pups at all.

    JP
    G&L USA JB, FrankenJazzuar, Hartke 210 Combo, Darkglass B7K Ultra, Boss GT-1B, SansAmp Programmable BDDI, EBS Fuzzmo

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    #134946
    Jeff Preston
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    Think maybe I smoked the Master Volume pot. 😡

    JP
    G&L USA JB, FrankenJazzuar, Hartke 210 Combo, Darkglass B7K Ultra, Boss GT-1B, SansAmp Programmable BDDI, EBS Fuzzmo

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    #134954
    bonin in the boneyard
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    Aw crap.  I think you can do that if you get it too hot for too long.  But it’s hard to do just soldering the lug.

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