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J150 Soundboard


KennyFreed
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I need a bit of advice about a 12 year old J150 that is always kept in its case when not being played. If I run my finger along the center of the soundboard behind the bridge I can feel a slight line indent where I'm assuming the soundboard joint is. Is it time to take it to the repair shop? Everything is else is ok with the guitar it never seems to go out of tune.

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Running along the center seam? In the same direction as the grain, or across it? Closer to the bridge, or towards the indent typically occurring at (over) the tail block? Any chance it will photograph (for some reason, things like this might photograph better in the reflection of a mirror)?

 

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What kind of heating do you have? Tomorrow's low temp in Glasgow is forecast to be 37deg F/3 C. It can be humid outdoors and still be dry inside, thanks to heating and cooling systems. As opposed to Taylor (and probably Yamaha, but they're not tellin'), the thin coat of nitro on a Gibson is highly reactive to environmental influences. But usually a dry guitar will show a raised center seam, not an indented one. Time to go inside your guitar with a torch, ..err, flashlight & a mirror... a cracked or loose cross brace under the top will allow things to sink a bit, but usually before the bridge (under the strings).

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Not a Taylor guy, but found these vids very informative.

Repairing a crack by re-humidifying the guitar. Kind of cool.

The guitar in the vids is in much worse shape than what you

described with yours.

The process took about 5 days.

 

 

 

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Since there are no photos I will hazard a guess. The guitar is finished with Nitrocellouse lacquer and this will shrink with the passage of time. As it shrinks it can find itself "dropping" or shrinking into the glue joints of the guitar. This can cause some folks to think their neck laminations are separating or their top coming apart. It's just the nature of the finish and if this is the cause of your problem then you are just seeing your guitar go thru it's natural aging process. Pictures are helpful.

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Nothing shows up in a photo it's more by running a finger along the sound board that I can feel the slight indent. The shrinking lacquer is something I'd not heard about before but that could be the problem. Anyway, when I get a chance I'll take it to a repair shop to look at and let you know the result. Thanks for all your input.

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Thank you for taking the effort to put a visual to your issue. It is, however, seriously zoomed in. Almost can't see the forest for the trees, though, even when zooming out. Could you tell us where, in the lamp's reflection, for example, we should be looking? Is it the longitudinal grain line in the broken area of the lamp's reflection to the left?

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Thank you for taking the effort to put a visual to your issue. It is, however, seriously zoomed in. Almost can't see the forest for the trees, though, even when zooming out. Could you tell us where, in the lamp's reflection, for example, we should be looking? Is it the longitudinal grain line in the broken area of the lamp's reflection to the left?

 

 

Just scale your screen down to 50%, and you will see it. In the left middle of the light reflection. Looks pretty minor to me.

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