Winter Build off 2022 Wally Maple Nut

[Reedt2000]

I think it might be the diagram. I'm no expert but looks like it shorts the jack to ground? Check out this one

And I'll page @AudioTaper or @dwizum to check my math

 

[Level5wizard]

I think it might be the diagram. I'm no expert but looks like it shorts the jack to ground? Check out this one

View attachment 4681075

And I'll page @AudioTaper or @dwizum to check my math

Also worth mentioning pot values may need to be different for the active pickups compared to passive.

Here is the one I used.

 

[TerribleTim68]

Reed is right, your diagram shows the "hot output" from the jack going to the ground. The diagram he showed has it swapped with the middle pin on the tone pot. I'd swap it like his diagram and I bet it'll work.

 

[Reedt2000]

Here is the one I used.

I know, I believe there is an error on it. The tip from the jack wants to go to center lug on the tone pot. The SD diagram has it going to ground. Check out the one I posted, doesn't matter it's a PJ.

 

[TerribleTim68]

That SD diagram basically has everything from the jack grounded. There's no way the signal can leave the bass like that.

 

[Level5wizard]

That SD diagram basically has everything from the jack grounded. There's no way the signal can leave the bass like that.

Ok, thanks guys. I'll hop on this tomorrow after work. Thank you

 

[dwizum]

Yeah, the tone pot is definitely wrong on the SD diagram. That diagram pops up around here from time to time and confuses people every time.

 

[Level5wizard]

It is this kind of thing that make people get modern EMG's.

 

[Jeff Siddall]

Neither of those diagrams shows the output going to ground. Unfortunately there are two black "bus" wires joining a bunch of stuff. One is ground one is signal, and the signal does go to the tip in both, but it isn't obvious.

However, it is strange that the cap is wired directly to the output in that one diagram. Not right, but won't give you no output.

Double check that there is really 9 V (or close to it) on the red wires. That will confirm that the battery and connector are good. If you don't have some kind of volt meter it would be worth getting one. Even a cheap multimeter is a really useful tool.

Also double check that the tip/ring/sleeve are correct on the jack. The order may not match the diagram, so if you have a multimeter you can use the ohm meter for that. Also look for shorts to the shielding tape on things like pots and jacks. If you don't find the problem you could try disconnecting one pickup entirely, then connect a 9 V battery directly to the pickup power connector (i.e.: not through the sleeve of the jack) and the pickup output directly to the tip and ring of your jack. If you have sound then at least you have proven the pickup is OK.

Good luck!

 

[Level5wizard]

And I just realized I'm using 250k pots. I'll look for some 100k

 

[Max Bogosity]

And I just realized I'm using 250k pots. I'll look for some 100k

Seymour Duncan uses 100k for their active pickups. EMG uses 25K. Who knows what the MEC pickups are designed around. I had a quick look on their site but their wiring diagrams seem to show part numbers instead of values; they really want you to buy their wiring harness.

 

[Level5wizard]

So I found A25k and B25k pots.
Whichever is the right one?

 

[Reedt2000]

According to this article A is the most common (logarithmic or audio taper, B is linear)

I need/want to exchange parts of the electronics. What parts should I get? - .strandberg* Guitars Knowledge Base

 

[Jeff Siddall]

So I found A25k and B25k pots.
Whichever is the right one?

I wouldn't worry too much about the pot resistance for active pickups. For passive pickups the potentiometer load can have a significant impact on the tone/level, but for active pickups the output impedance is less and thus lower value pots can be used. In your case, you can definitely use active pickups with 250K V/T pots and no issues.

Taper (the difference between A and B pots) is a personal preference but I tend to use audio (A) tapers. They have a fairly steady perceived change in level across the rotation. Linear pots (also called B taper) tend to have very fast change at one end of the rotation and very slow change at the other. Some people go for that kind of thing. FWIW Fender uses A pots.

 

[RichterScale]

I heard that the reason for using lower ohm pots with active electronics is because the high end output is higher with actives and lower ohm pots help bleed off some of those highs.
That sound right?

 

[Reedt2000]

You've got it all but wired, I'd move that lead from the jack and see what happens. You can always swap out the pots later if you want.

 

[Level5wizard]

She's done!

 

[Beej]

Awesome!

 

[Level5wizard]

Better pics

 

[Flamingo21]

Beautiful instrument. The "woody look" (pot knobs, pup covers, and nut) works really well here.