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Thread: Jacobson Carbon Fiber Mandolin Prototype

  1. #51
    Moderator JEStanek's Avatar
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    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    Wow. It looks and sounds great. I love the sound hole design. Very aggressive looking that goes well with the CF material.

    Jamie
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  3. #52
    Registered User Ivan Kelsall's Avatar
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    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    Marty - You could make a 'sacrificial' lay-up to your spec.inside the mould tool,& then cast a silicon rubber 'Intensifier plug' inside it. Simply make sure that the surface of the plug is as smooth as it can be. Using the plug,which will 'spread' under vac. pressure,will iron out any wrinkles - in fact,it ''should'' totally prevent any wrinkles occuring. Or - if you're only having any problems with either the body shell or neck,cast a plug for that section only,
    Ivan
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  5. #53

    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    Nice work,Marty!

    Always wanted a CF mandolin;esp. since I got a vey nice sounding Composite Acoustics guitar(Standard X) that I have owned for a decade
    or so. Love it. No worries about leaving it in a hot car etc. Worry-free acoustic instrument.

    Well,I do sorta worry about getting it refretted. There is zero organic material/no wood,in the CA guitar(AFAIK).

  6. #54
    Resonate globally Pete Jenner's Avatar
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    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    Good one Marty.
    The more I learn, the less I know.

    Peter Jenner
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  8. #55
    I may be old but I'm ugly billhay4's Avatar
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    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    I guess I am having difficulty seeing how this produces a hollow neck.
    Bill
    IM(NS)HO

  9. #56

    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    Quote Originally Posted by billhay4 View Post
    I guess I am having difficulty seeing how this produces a hollow neck.
    Bill
    Think paper mache stuck to a balloon... But instead of paper and glue, it's fabric and epoxy and the bag pressing the fabric up to the mold.

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  11. #57
    I may be old but I'm ugly billhay4's Avatar
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    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    Ah, got it. I think.
    :-)
    Bill
    IM(NS)HO

  12. #58
    Registered User amowry's Avatar
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    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    I got to see this mandolin in person when Marty stopped by the shop today. It sounds amazing! Marty's really on to something here.

  13. #59
    Notary Sojac Paul Kotapish's Avatar
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    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    Very impressive! Beautiful design, great sound. Any initial thoughts about production, price point, etc.?
    Just one guy's opinion
    www.guitarfish.net

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  15. #60

    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    Thanks Andrew! I gotta say it looked pretty janky compared to your work, haha.

    Paul, I have more R&D to do on this but will be producing more this year. Price point will be $3-4k, most likely.

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  17. #61
    I may be old but I'm ugly billhay4's Avatar
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    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    I played this instrument last night. Very nice sound. Marty is working out the bugs in production in his head and I can guarantee it will be beautifully produced. He is as precise as anyone I've ever know except, possibly, Andrew.
    I play one of Marty's wood instruments and have yet to find a flaw in it.
    Bill
    IM(NS)HO

  18. #62
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    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    That's great to hear, Marty! I'm very interested, and have no doubt you'll get them "right" before you unleash them!
    Chuck

  19. #63
    Registered User j. condino's Avatar
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    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    I was hoping to get in a test drive at the Guild of American Luthier's convention, but never saw you.....

  20. #64
    I may be old but I'm ugly billhay4's Avatar
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    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    Marty didn't make the convention. We took his kids and wife to Mt. St. Helens instead. He was on a tight schedule and only had Wednesday available.
    For what it's worth, Mt. St. Helens was great.
    Marty is wending his way back to Georgia now. He may have even gone crazy now with three boys, 10, 8 and 6, on a month long drive across country.
    You'll know if he went crazy if his next build is a CF banjo.
    Bill
    IM(NS)HO

  21. #65
    Mando-Accumulator Jim Garber's Avatar
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    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    Quote Originally Posted by dan in va View Post
    But there are 2 more i would like to have if they sounded good: a tater bug and carbon fiber oval hole.
    How about a carbon fiber tater bug with an oval hole? Now you are talking.
    Jim

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  22. #66

    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    2010 Heiden A5, 2020 Pomeroy oval A, 2013 Kentucky KM1000 F5, 2012 Girouard A Mandola w ff holes, 2001 Old Wave A oval octave
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  23. #67

    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    Quote Originally Posted by Don Grieser View Post
    Very cool, but an even smaller market (and hence ROI) than American-style mandolins.

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  25. #68
    Registered User j. condino's Avatar
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    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    Bada$$!!!! Darth Vader meets the Godfather; tech that my great grandfather would approve of!

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  27. #69
    Mando-Accumulator Jim Garber's Avatar
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    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    Quote Originally Posted by Don Grieser View Post
    Yikes. ~$3700 is a bit more than I want to pay. Then again, I don't really want to pay. I have a few excellent bowlbacks. I can't play them in the bathtub but you can't have everything.

    Jim

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  28. #70
    harvester of clams Bill McCall's Avatar
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    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    Quote Originally Posted by Jim Garber View Post
    ..........I can't play them in the bathtub but you can't have everything.
    You could once��
    Not all the clams are at the beach

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  30. #71

    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    If you would like to hear some fine mandolin playing, check out my first bands version of this song. (Journeybear is on mando and I’m playing the fiddle part on this one.): https://youtu.be/VGjKD5p5NX8

  31. #72
    Mando-Accumulator Jim Garber's Avatar
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    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    Oops! I may have derailed this thread with "Singing in the Bathtub." Now I will have to put in my order with Marty for my CF mandolin. Marty, can you make me a CF bathtub to go with it?
    Jim

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  32. #73

    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    Why do you need a CF bathtub, Jim? Just keep it at 45% RH and you're fine with your current wooden one.

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  34. #74
    Mando-Accumulator Jim Garber's Avatar
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    Default Re: Jacobson Carbon Fiber Mandolin Prototype

    You are right. The Florentine bathtub I inherited from Grandpa would do just fine, although those points stick into me at times. Grandma always preferred the three-point.
    Jim

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