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Thread: Broken neck on Gibson Jam Master.

  1. #126
    Registered User skygazer's Avatar
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    Default Plastic spline in fine instruments? No thanks!

    Quote Originally Posted by mirwa View Post

    When we fit splines. we take those splines all the way through until we just touch the fretboard, its not required, but for us its the best process we have found.

    Steve
    I think your splines look super rugged, beyond the strength of new. Not really discussed here is that the grain in the spline runs differently than the grain in the neck, so the same force applied would act differently on the neck and splines, gaining huge strength.

    Personally, I would want some type of wood spline as Steve is doing on my instruments, I would NOT want carbon fiber. I know carbon fiber is currently all the rage, and I do like it for many things. BUT, people forget that it is not actually the way it is called. It is not "carbon fiber", it is "carbon fiber reinforced plastic". In other words, it is plastic! No plastic structural material in my fine instruments thank you! I'm old enough to have seen all types of plastic become brittle over time. Wood and steel can be almost forever if cared for.

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  3. #127

    Default Re: Broken neck on Gibson Jam Master.

    Quote Originally Posted by darylcrisp View Post
    Steve
    please post a picture when it has been repaired.
    thanks
    d
    Ref post #48

    Just finished painting this one, customer wants to see the splines, I have just sent them the same picture to make sure.

    badge of honour

    Pictures a fraction dark, because its still in the paint booth, and lights are overhead

    Steve
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Last edited by mirwa; Aug-07-2015 at 2:22am.

  4. #128
    Registered User jim simpson's Avatar
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    Default Re: Broken neck on Gibson Jam Master.

    Was tempted to buy a basically new Gibson Blues King at a show. The neck had been broken and pro repaired. Asking price was $1000 but the repair just held me back.
    Old Hometown, Cabin Fever String Band

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  6. #129
    Certified! Bernie Daniel's Avatar
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    Default Re: Broken neck on Gibson Jam Master.

    Quote Originally Posted by jim simpson View Post
    Was tempted to buy a basically new Gibson Blues King at a show. The neck had been broken and pro repaired. Asking price was $1000 but the repair just held me back.
    Well, not to worry there is another "Lucille" for sale on eBay for about $7 GRAND!
    Bernie
    ____
    Due to current budgetary restrictions the light at the end of the tunnel has been turned off -- sorry about the inconvenience.

  7. #130
    Registered User skygazer's Avatar
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    Default Re: Broken neck on Gibson Jam Master.

    Quote Originally Posted by Bernie Daniel View Post
    Well, not to worry there is another "Lucille" for sale on eBay for about $7 GRAND!
    Just what I need, a plywood guitar with no sound holes. Be great for quiet practice.

    Oh never mind, I think I'll stick with my Martins.

    But regarding the repair, the dump truck I have with the repaired frame is my absolute favorite truck, and I know the repair is 10 times stronger than the factory build so I can tackle more with it and not be overly concerned. I have a newer truck with maybe one thousand miles on it, it's OK but not up to the repaired one in my mind.

    Plus, the repaired one has custom speakers so good the sound is better than headphones, I hear words in ancient songs that I've never been able to discern before.

  8. #131

    Default Re: Broken neck on Gibson Jam Master.

    What do you cut the neck with to fit the splines? I have a Kentucky neck that's nbeen glued 3 times and keeps breaking after a few months.
    "There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle." - Albert Einstein
    "We either make ourselves miserable or we make ourselves strong. The amount of work is the same."
    ~Carlos Castaneda

  9. #132

    Default Re: Broken neck on Gibson Jam Master.

    Quote Originally Posted by Kennyz55 View Post
    What do you cut the neck with to fit the splines? I have a Kentucky neck that's nbeen glued 3 times and keeps breaking after a few months.
    A router.

  10. #133
    Certified! Bernie Daniel's Avatar
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    Default Re: Broken neck on Gibson Jam Master.

    Quote Originally Posted by skygazer View Post
    Just what I need, a plywood guitar with no sound holes. Be great for quiet practice.

    Oh never mind, I think I'll stick with my Martins. .....
    HEY! Wash yer mouth out with soap that's quality hard wood laminate!

    Top Wood Species: Maple, Poplar, Maple
    Binding: 7-Ply (W-B-W-B-W-B-W)
    Back Wood Species: Maple, Poplar, Maple
    Binding: 3-Ply (W-B-W)
    Rim wood: Maple, Poplar, Maple
    Average Weight (body only): 2.3541 kg / 5.190 lbs
    Glue used: Franklin Titebond 50
    Bernie
    ____
    Due to current budgetary restrictions the light at the end of the tunnel has been turned off -- sorry about the inconvenience.

  11. #134
    Registered User skygazer's Avatar
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    Default Re: Broken neck on Gibson Jam Master.

    Quote Originally Posted by Bernie Daniel View Post
    HEY! Wash yer mouth out with soap that's quality hard wood laminate!

    Top Wood Species: Maple, Poplar, Maple
    Binding: 7-Ply (W-B-W-B-W-B-W)
    Back Wood Species: Maple, Poplar, Maple
    Binding: 3-Ply (W-B-W)
    Rim wood: Maple, Poplar, Maple
    Average Weight (body only): 2.3541 kg / 5.190 lbs
    Glue used: Franklin Titebond 50
    Yes, poplar is my favorite quality hardwood, only a bit softer than white pine.

    I'm only able to distinguish marine plywood from regular plywood, just can't seem to distinguish a poplar veneer sandwich from regular plywood - oh yeah, they don't use poplar in regular plywood. Have to get the cheap stuff.

    Since I was about 8 yrs. old poplar has not been popular with me, I found it extremely weak and disappointing.

  12. #135
    Registered User sunburst's Avatar
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    Default Re: Broken neck on Gibson Jam Master.

    Quote Originally Posted by skygazer View Post
    Yes, poplar is my favorite quality hardwood, only a bit softer than white pine. ...
    ...Since I was about 8 yrs. old poplar has not been popular with me, I found it extremely weak and disappointing.
    eastern white pine:

    Janka Hardness: 380 lbf (1,690 N)
    Modulus of Rupture: 8,600 lbf/in2 (59.3 MPa)
    Elastic Modulus: 1,240,000 lbf/in2 (8.55 GPa)
    Crushing Strength: 4,800 lbf/in2 (33.1 MPa)

    tulip poplar:

    Janka Hardness: 540 lbf (2,400 N)
    Modulus of Rupture: 10,100 lbf/in2 (69.7 MPa)
    Elastic Modulus: 1,580,000 lbf/in2 (10.90 GPa)
    Crushing Strength: 5,540 lbf/in2 (38.2 MPa)

    Oh, and for reference, red spruce:

    Janka Hardness: 490 lbf (2,180 N)
    Modulus of Rupture: 9,580 lbf/in2 (66.0 MPa)
    Elastic Modulus: 1,560,000 lbf/in2 (10.76 GPa)
    Crushing Strength: 4,870 lbf/in2 (33.6 MPa)

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  14. #136
    Registered User skygazer's Avatar
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    Default Re: Broken neck on Gibson Jam Master.

    Quote Originally Posted by sunburst View Post

    tulip poplar:

    Janka Hardness: 540 lbf (2,400 N)
    Modulus of Rupture: 10,100 lbf/in2 (69.7 MPa)
    Elastic Modulus: 1,580,000 lbf/in2 (10.90 GPa)
    Crushing Strength: 5,540 lbf/in2 (38.2 MPa)
    I meant to be more humorous than scientific. But to me tulip poplar means a completely different super tall straight tree that grows well south of here, suitable for war canoes. I think they have some type of upright flower or cone with petals that resemble upright tulips.

    What we call poplar here has cotton with seeds.

    Poplar up here is a weedy bushy "tree" that grow in almost a colony, spreading by roots I guess. I think of them as good for wildlife when young, and then they blow down. And rot quick.

    I appreciate your scientific knowledge however, thank you for sharing!

  15. #137
    Registered User belbein's Avatar
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    Default Re: Broken neck on Gibson Jam Master.

    Hey, I happen to be researching this exact break, though in a banjo. It turns out that this is really, really common. It's certainly fixable. And though I have fought hot hide glue for years, on my practice repair mandolin--with the same kind of break as on my banjo*--the hot hide glue worked great. I'm not saying it won't be a pain in the butt to fix--you have to make cauls and prepare the HHG and figure out how to get it way down in that crack--but it isn't technically difficult.

    *No, I'm not the one who broke either instruments, and my instruments do not "tend" to have their necks broken, even when they deserve it by not playing up to the standards to which I'd like to become accustomed.
    belbein

    The bad news is that what doesn't kill us makes us stronger. The good news is that what kills us makes it no longer our problem

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