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PostPosted: Mon Oct 03, 2016 9:44 pm 
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Joined: Wed Dec 26, 2012 1:10 pm
Posts: 63
A friend of mine bought an old Kay archtop guitar.
Attachment:
IMG_0310 (1).jpg

The nut cracked when he was bringing it up to tune (pretty cool headstock BTW).
Attachment:
IMG_0308 (1).jpg

Since he is a Dobro player, he'd like to replace it with a "high" nut so he can play
it lap style. The current nut is 1 5/8", but he'd like to widen it to 2" to get better string spacing.
One more thing: He tunes to open G, so there will be more string tension.

Questions:
1. Will the combination of a higher nut and higher string tension, put too much stress on the neck?
2. The wider 2" nut will extend out 3/16" from the neck, leaving it essentially unsupported. Is this a potential problem?
3. Another option is to replace it with a normal nut and Cap it with a "Fret extender" like this:
https://www.amazon.com/Grover-GP1103-Perfect-Guitar-Nut/dp/B00W7ZL4TM
Anyone have experience with these?

Thanks, It's been a year to too since posting. Nice to "see" you all again.

Mitch


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PostPosted: Tue Oct 04, 2016 6:36 am 
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Joined: Fri Mar 03, 2006 7:09 pm
Posts: 5422
Location: Hegins, Pa
should be ok

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PostPosted: Tue Oct 04, 2016 9:23 am 
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Joined: Sat Apr 10, 2010 10:50 pm
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Location: Seattle
Quote:
The current nut is 1 5/8", but he'd like to widen it to 2" to get better string spacing ... The wider 2" nut will extend out 3/16" from the neck, leaving it essentially unsupported.


I am confused; how do the strings that are not over the fret board get fretted?

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PostPosted: Tue Oct 04, 2016 8:10 pm 
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Joined: Wed Dec 26, 2012 1:10 pm
Posts: 63
You don't!
The guitar is flat on your lap and you fret the strings from the top with a metal bar. You have to have a tall nut so the string won't touch the frets. The frets are just there for visual reference to help position the bar
https://m.youtube.com/watch?v=3dtPc3wNxOg

I need to do some research on this, but since you don't fret the string, I'm thinking that compensation at the bridge is not needed. Anyone have info on this?

Mitch


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PostPosted: Tue Oct 04, 2016 9:39 pm 
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Joined: Wed Dec 26, 2012 1:10 pm
Posts: 63
> should be ok

I should have also mentioned he uses heavy strings (0.016 -0.056), so combined with tuning up a step and a half (to G) I was concerned about the portion of the nut that is unsupported.
Is one nut material stronger than another?
What about starting with thicker nut stock?
Or am I over thinking this?

Thanks

Mitch


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PostPosted: Wed Oct 05, 2016 12:52 pm 
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Joined: Sat Apr 10, 2010 10:50 pm
Posts: 2281
Location: Seattle
Thanks for the clarification, I had always thought that the metal bar pushed the string down to the fretboard but I can NOW see just having it in contact with the strings is enough.

I obviously know nothing about a Dobro, but I follow your logic about lack of necessity for intonation.

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