doubleneck wiring

[graham high]

Hello all, i have an sg doubleneck in the shop that i need to wire up but can`t find a diagram other than gibsons schematic for a 1275.i almost understand the schematic but i have a 4 pole 3way toggle and i`m not sure how to connect it.it has 12 lugs .to make matters worse it`s a lefty.anyway he wants it wired like a 1275 can anybody help thanks graham4%20pole%20switch.jpg4pole%20switch.jpg

[Paul Verticchio]

Hi Graham.

I'm not sure I understand your predicament.  The Gibson 1275 IS an SG doubleneck.

Without doing hours of research, I don't think you will be able to use the 4 pole switch to handle the job.

The wiring requires two separate switches to choose between the 2 necks and 4 pickups.

If I'm 'not getting' what your desire as an outcome, could you explain it like:

1. Here's what I have...describe your  pickups & controls... (ex. 2 HB  on each neck and common 2 V & 2 T control setup)

2. Describe what you wish to change to accomplish your goals (your destination).

IF cloning the electronics of a 1275 is your goal, simply follow the schematic using the parts specified (or their equivalents).

Best of luck :-)

[graham high]

hi paul, the guitar is a jay turser 1275 copy with 2 HB  on each neck and common 2 V & 2 T he wants it wired with a shared pickup selector switch and a neck selector switch thanks graham

[Paul Verticchio]

Good luck with that.  What he's asking for is beyond my comprehension....from both a "how" and why" approach.

Hopefully someone more creative than I can come up with a workable solution.

I'd make a silly wager that, if it can be done, he asks for the guitar to be put back to stock wiring within 6 months.  It always seems to work like that.  What sounds good on paper rarely translated to hassle free control in a "live" setting.

Best of luck.

[Russell Vance]

12015X - Switchcraft - Octopart

octopart.com/12015x-switchcraft-8288454

That's the Gibson switch.   You may wish to go nuts on the web trying to find a switch schematic to enable you to configure your existing switch pin-out (providing the supplied switch is capable of this switching).   Nobody has fun doing this and I can't find a double neck schematic for the switch you have which looks similar to the ones I've seen in other non-Gibson doublenecks. 

However if you Google "doubleneck guitar wiring diagram and schematic" you can get a bunch of generic wiring schematics for switching configuration purposes (they generally show two switches to handle the pickup selection and these should be viewed as one switch with multi-poles and throws).  

I generally keep a large doubleshot of coffee and a box of Panadol nearby when doing this stuff - make my head hurt.

Good Luck,

Rusty.

[Joshua Levin-Epstein]

I found 2 fairly recent diagrams on the Gibson site, which have 2 toggle switches. Apparently this is the current "standard" with a pick up selector that works on both pairs simultaneously and a neck selector. The pick up selector is the switch Rusty references and the neck selector is the standard Gibson toggle, though both are right angle. You can use the switch you have for the pick up selector. Think of it as two switches, A&B for one pair of pick-ups, C&D the other pair. The switch will have two outputs, each going to a volume/tone, which in turn go to the neck selector. The flaw in this system is though you can preset the volume and tone of each neck, the pick up selection will have already been made when you switch necks.

 

 I have seen Gibson doublenecks with both 2 and 3 switches: The 3 switch sytem has two pick up selectors and a neck selector. You can use the standard pick up selector for all 3 switches. Each pair of pick-ups go to its selector, then to its controls and the output of the volume control goes to the neck selector.

 

That being said,,,,,How is the guitar wired now?

 

Joshua

[Joshua Levin-Epstein]

Let me rephrase some of this: The Turser website says the current double neck has a neck selector and pick up selector. The only difference between this and the current/simplified EDS-1275 wiring is the (current) Turser has a master tone control rather than one for each neck. If your customer's guitar is functioning like this, then I'm not sure what you need to do (back to Paul's post). If there's something wrong with the guitar, that's a different story.

Diagnose the problem. Are there bad components or has someone already been in there working their magic? These guitars are full of cheap components so sometimes it is easier (if not more expensive) to start from with new, good quality (Switchcraft, CTS) components. If this were on my bench, I'd remove the necks to make it easier to work on.

Also, be aware that when both necks are on, you'll have a loss of highs, same (but worse) as when both pick-ups of a 2 pick-up guitar are on.

 

Have I stopped yet?

 

Joshua

.  

[Paul Young]

If this is indeed your schematic:

Gibson 1275 Double Neck Schematic

This is very similar to wiring a pot with a push pull switch, solder all grounds to the switch somehow, and solder the switch to the ground etc.  I won't mention grounds again as that will be assumed, unless you have a question of course.

This is how it can be wired:

1. Position 1 is the top guitar

    Solder neck pickup to A first lug and bridge pickup to D first lug, (the top outside two lugs on the switch)

2. Position 2 is both guitars at once, on the switch these will be the middle lugs.

To be as simple as possible, there needs to be two outputs, so middle poles AB and CD need to be soldered together and those will be your two outputs made from four lugs, AB for neck and CD for bridge.  So you'll need to strip some extra bare wire to bridge the gap between the lugs. 

Solder AB in the second lug row to the input of your neck volume and tone. 

Solder CD in the second lug row to the input of your bridge volume and tone.

3. Position 3 is the bottom guitar

    Solder neck pickup to B third lug and bridge pickup to C third lug. (the bottom two middle lugs on the switch)

That should do it.

I'm including a diagram I just threw together in Photoshop, as sometimes that explains things better than a thousand words.

[graham high]

Thanks a million paul your the best! that`s exactly what i was looking for cheers graham

[Paul Young]

No problem man glad to help you out.

[Paul Verticchio]

@ Paul Young.:  Ah ha! You understood what he wanted. Good call and an EXCELLENT tutorial our new friend.

Graham, here's what I think was throwing the rest of us: "shared pickup selector switch and a neck selector switch".

Personally, I inferred that he wanted all switching to be done by a single switch.  Had you said "shared pickup selector switch and a separate neck selector switch". I think you would have gotten your answer sooner. I thought the  'shared' statement included PUP selection w/controls AND neck selection.

BUT, Paul Y. came through & saved the day.  All is good :-) BTW: Paul, if one of your strong suits is instrument circuit analysis and design/troubleshooting, YOU are going to be a busy guy on this forum.  Thanks again, man!

Best of luck guys,

Paul V. :)

[Paul Young]

Thanks my friend for such kind words. 

I look forward to helping out anyone that's stumped on an electronics problem, as I get a kick out of solving that sort of thing, for me it's like solving a crossword puzzle.

> YOU are going to be a busy guy on this forum.

What have I gotten myself into?

Paul Y