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Thread: Gibson F9 with sunken top

  1. #51
    Lurkist dhergert's Avatar
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    Default Re: Gibson F9 with sunken top

    You know, we're missing an important point, and possibly a great opportunity here...

    To the OP or anyone else who has tried this... How did the mandolin sound with the sound post added?

    (Edit: Whether the carbon rod was intended as a sound post or not, that is at least partially what it is functioning as. Perhaps an easy fix would be to put a longer one in place.)

    Speaking as a double bass player, there's a world of experimentation possible with sound posts.
    -- Don

    "It is a lot more fun to make music than it is to argue about it."

    2002
    Gibson F-9
    2016 "$199.00 solid F style" MKLFSTB
    1975 Suzuki taterbug
    (plus a large assortment of banjos, dobros, guitars, basses and other noisemakers)

    [About how I tune my mandolins]

  2. #52
    Certified! Bernie Daniel's Avatar
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    Default Re: Gibson F9 with sunken top

    Quote Originally Posted by dhergert View Post
    You know, we're missing an important point, and possibly a great opportunity here...

    To the OP or anyone else who has tried this... How did the mandolin sound with the sound post added?

    Speaking as a double bass player, there's a world of experimentation possible with sound posts.
    I think the "sound post" referred to in a earlier post was mis-named. It was not a sound post (like on a violin) but actually a supplementary carbon fiber tone bar that the OP says Big Joe glued in place in hopes of preventing the top collapse. Apparently it failed. It might be noted also that Big Joe has no recollection of ever making such a repair on the mandolin that is the subject of this string.

    But so far - after 52 posts on this topic -- we have yet to see an image of this Gibson F-9 with the sunken top. Just out of curiosity I would like to see it.

    The idea of a sound post on a mandolin has been tried before and also been discussed many times in the past. I think the consensus opinion is that they do not contribute the the tone and projection on a mandolin like they do on a violin.

    In one case I know a sound post inserted in a mandolin resulted in a crack in the back board due to the pressure of the strings.
    Bernie
    ____
    Due to current budgetary restrictions the light at the end of the tunnel has been turned off -- sorry about the inconvenience.

  3. #53
    Lurkist dhergert's Avatar
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    Default Re: Gibson F9 with sunken top

    Hmm, you may be right. The clarification was still a little unclear to me:

    Quote Originally Posted by unclelee View Post
    sorry about not being clear about the carbon rod, it is not a sound post, it is glued or attached along the top. I can just feel it using my little finger in the f hole. it is about 6 inches long.
    After having experimented with sound posts in my bass, I'd actually be tempted to try one with a sunken top mandolin in this situation. On a bass, which typically has pretty huge tension on the top, there is often a thin sheet of cross-grain wood between the ends of the sound post and the top and back, to prevent cracking of either. I'd also consider something like that. But there is also a science to placing the sound post on viol family instruments that has a huge effect on tone. That requires experimentation and time, and on a mandolin at standard tuning, probably a lot of strings.
    -- Don

    "It is a lot more fun to make music than it is to argue about it."

    2002
    Gibson F-9
    2016 "$199.00 solid F style" MKLFSTB
    1975 Suzuki taterbug
    (plus a large assortment of banjos, dobros, guitars, basses and other noisemakers)

    [About how I tune my mandolins]

  4. #54
    Certified! Bernie Daniel's Avatar
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    Default Re: Gibson F9 with sunken top

    Quote Originally Posted by dhergert View Post
    Hmm, you may be right. The clarification was still a little unclear to me:



    After having experimented with sound posts in my bass, I'd actually be tempted to try one with a sunken top mandolin in this situation. On a bass, which typically has pretty huge tension on the top, there is often a thin sheet of cross-grain wood between the ends of the sound post and the top and back, to prevent cracking of either. I'd also consider something like that. But there is also a science to placing the sound post on viol family instruments that has a huge effect on tone. That requires experimentation and time, and on a mandolin at standard tuning, probably a lot of strings.
    Yes, I agree -- worth a shot it would seem especially if you do like you say make sure that you distribute the stress so that the "post" does not damage the top or back boards. Person would have nothing to lose to try?

    On one of Jerry Rosa's repair videos he did just that approach. A customer presented a relatively inexpensive Pac-Rim mandolin that had serious top sag and was not worth the expense of fitting a new top. So Jerry put in a sound post (with a small wood plate on both ends to distribute the stress). It work in the sense the it prevented the top sag and the mandolin was again playable.

    The mandolin wouldn't win any prizes as to tone or projection but then it was not that great too begin with! LOL.
    Bernie
    ____
    Due to current budgetary restrictions the light at the end of the tunnel has been turned off -- sorry about the inconvenience.

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  6. #55
    Adrian Minarovic
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    Default Re: Gibson F9 with sunken top

    There are those CF adjustable violin soundposts... they have larger footprint and can be jacked up to lift the sunken arch if needed...
    Adrian

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