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PostPosted: Tue Sep 25, 2007 1:49 am 
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Brazilian Rosewood
Brazilian Rosewood

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Every time I make a 12 string, the cutting of the nut gets the better of me. But on this one, it just "clicked" so I thought I'd share. (Also so next time I can go back to the archives and figure out how I did it. )
Start first by marking the outer points of the nut.


Next mark the two outer strings, their set-in from the edge of the neck. In this case I went 1/8 on the bass side and 3/32 on the treble side.


Now that we have the limits we're ready to lay the string spacing in. One thing to remember during this, and this is why 12 string nuts are so confusing, is that the two marks we have represent one main course string and one sympathetic string.
So at this point you need to determine the spacing you want between the main course and sympathetic string. I've chosen 3/32 on the bass side and 1/16 on the treble side. Transfer those marks to the nut. Remember that both measurements need to move toward the center of the nut.


Now with the trusty string spacing tool from Stew Mac (this should already be in everyone's tool box) you'll want to connect the main course marks and the sympathetic course marks. So in this case, the sympathetic course are the strings more toward the bass side of the neck. So I'll connect them with the spacing tool.


Move the tool over and do the same for the main course strings. For me, I had to use different "slots" of the tool because my distances between strings changed from E to e. What this does is give me a gradual change across the neck.
Here's what the final layout looks like.

Hope this was informative. Let me know if I was unclear about anything.


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PostPosted: Tue Sep 25, 2007 1:59 am 
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Brazilian Rosewood
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Cool and very understandable, Paul. Thanks for posting. Showing pencil marks on an actual nut using the spacing rule might be even more clear.

What nut width do you typically use for a 12 string?

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PostPosted: Tue Sep 25, 2007 2:46 am 
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Brazilian Rosewood
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JJ there is no real "typical" for my 12 strings. This one has a 1.75 nut. Yes, 1.75. It's kind of scary trying to fit all 12 strings in that amount of space and still make it easily playable.


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PostPosted: Tue Sep 25, 2007 3:18 am 
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Brazilian Rosewood
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So if 1.75" is the low end, what has been your high end? Personally, I was considering that 1.87" was "typical".

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PostPosted: Tue Sep 25, 2007 3:49 am 
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Nice and simple technique.  Easy to follow.  Good job explaining.    

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PostPosted: Tue Sep 25, 2007 3:51 am 
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Brazilian Rosewood
Brazilian Rosewood

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[QUOTE=JJ Donohue] So if 1.75" is the low end, what has been your high end? Personally, I was considering that 1.87" was "typical".[/QUOTE]
I had a client want a 2" once. I couldn't hardly play the darn thing. But I think you are right that 1.875 is pretty much average.


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PostPosted: Tue Sep 25, 2007 4:15 am 
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Thanks, Paul.
Clear as a bell.
Guess I should break down and get that spacing tool...

Steve

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PostPosted: Tue Sep 25, 2007 6:11 am 
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Brazilian Rosewood
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   Paul, Thanks for the tut!

    I was wondering have you experimented with minimums in sympathetic spacing? Vis-a-vis how close can you go and what happens when you do! I've never done a 12 string before this is very helpful!

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PostPosted: Tue Sep 25, 2007 6:49 am 
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Koa
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Thanks, Paul! I used to tear my hair out doing these when I was doing repairs. Very clear and concise tutorial.

You earn the King Tut crown for the day!!

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PostPosted: Tue Sep 25, 2007 9:46 am 
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Cocobolo
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Another tip, when filing the slotsuse feeler gauges to set the depth, the bottom of the strings have to be even, or 1 will bend farther and make it sharp.
Lance


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PostPosted: Tue Sep 25, 2007 1:56 pm 
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Brazilian Rosewood
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VERY informative!


Thanks for sharing


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Ken H


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