Quote:
Originally Posted by felixxx  Since I have no idea what to do, I may find a technician able to do it. The problem is, would they know if I show them the same schematics? |
Yes. I think I remember that you want to do the SC-Inside mod. The beauty of DavePlayBass's idea is that it only requires replacing one switch. Everything else stays stock. So just tell the techie that: You are replacing a two way 4PDT switch with a three way 4PDT switch, and you want it to look like this... Then show him DavePlayBass's design.
It seems like some people were born with a soldering iron in one hand, and an EE diploma in the other... Moderately difficult is a relative term ;-)
It took me forever to understand the schematic... but basically I get it now. I had to draw in the wires to the coils like this:
This diagram adds a switch so just pretend that the yellow and white wires are continuous on the right side of the page, rather than going through the DPDT switch I drew in there.
Another thing that helps is to know how the stock and DavePlayBass 4PDT switch works.
4PDT switches have 12 contacts whether they are two-way or three way. Both two way and three way switches act the same when the switch is all the way left or all the way right. Easy to follow if you label the contacts on the bottom of the switch:
10 11 12
7 8 9
4 5 6
1 2 3
On my ugly scribbled up diagram of DavePlayBass's schematic, I put in red lines in to show the state of the switch. In this case, it's set for series OR...
10 11-12
7 8--9
4 5--6
1 2--3
You can set it in Parallel like this...
10-11 12
7--8 9
4--5 6
1--2 3
When you add the middle position the switch works like this:
10-11 12
7 8--9
4--5 6
1 2--3
NOTE: If you don't have the caps (you have a trib, right?), then 12 connects to 9 and 6 connects to 3. The bridge PU selector wire runs directly to 4 without connecting to anything else (no cap).
Energy flow is toward the ground...which means you follow the flow of energy from the pickup selector wire to the ground.
With the switch in series, as in the diagram, you can follow the flow into the white wire, through the coil, back through the black wire, around jumper, into the yellow and grounding out through the green.
Connect the switch for the other positions, and you should be able to see it.... It only took me...well, weeks ;-)
