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Help with single coil mod on L2k Usa 2004

#2
The only difference is that your bass doesn't have the caps (C1 and C2).

I think the simplest thing to do is ignore the caps. The far right top two posts get wired together (with no cap going between them and the white wire). The far right bottom two posts get wired together (with no cap going between them and the ground).

Alternatively, you could add the caps... In any case that's the only difference in the pics. Both the original switch and the replacement switch have the same number of posts. So other than the caps, you are just moving the wires to different switches.
 
#3
I can't understand this differences between my real wiring

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and the mentioned as "stock" in mod's document:

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As you can see there are many differences,for example white and yellow wire are inverted.



I want to do this mod:

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What I have to do for this?Invert yellow & white in scheme or in real wiring?

Can anyone help me with a little scheme?
Thanks!!!!
 
#4
The problem is that the "stock" wiring changed over the years. The "stock" wiring used for the bottom diagram is how L-2000s were wired originally (in the 80s and probably early 90s), and the "stock" wiring of your bass and the top diagram is how they are currently being wired (to my knowledge, including L2500s and Tribute L2000s). Both of the different wirings work identically for series/parallel switching (if you actually trace what the switches are doing, then the 2 diagrams function exactly the same), however the wiring in the top diagram WILL NOT work for the single coil modification. So you will need to wire your new 3 way switch exactly like the bottom diagram to make single coil switching work correctly (due to the way the 3-way switch functions).

Karl
 
#5
NO DON"T DO THAT. :eek:

If the capacitors are not used, they should NOT be replaced with shorts. They should just be removed.

The capacitors are intended to provide a path to ground for the highes in one of the two coils in series. If you replace this with a short, you will provide a path to ground for both the highes and lows. And the result will be the loss of a coil or single coil operation in the series setting.

So in short (pun not intended), replace the caps with "opens" and wire everything else the same.

Other than the replace the caps with shorts statement, I agree with everything else stated.
 
#7
sunbeast said:
actually trace what the switches are doing
Click to expand...

I think this is really good advice. I had a really hard time getting my head around these diagrams until I did that. Here's a diagram that shows the three states of the switch a three-way DPDT switch:

638b6b331a40c0f59c3bd40153294b0d0_large.jpg


A two-way DPDT swtich works exactly the same way, but has just the top and bottom settings--not the middle.

The stock and mod diagrams all use a 4PDT switchs. You can think of those as two DPDT switches, one on top of the other.

In the stock diagrams it's a two way switch, so in series middle poles connect to right side poles. In parallel, middle poles connect to left poles.

The mod you want uses the three way--which adds that middle state (top-middle connects to left-side, bottom middle connects to right-side). Again, for the 4PDT switch think of the top half of the diagram as one DPDT and the bottom half of another DPDT.

I did not really understand the mod (or stock for that matter) until I traced it out three times--one for each state of the switch.

I realized that 90% of the people reading this don't need to go to such lengths to understand the diagrams...but borrowing my 3 year old's crayons and doing it in color really helped me ;-)
 
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