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... Top plate with completed 'ff' holes. Now we turn out attention to the bass bar.
 ... Additionally, if you can find wood that naturally has the same grain curvature as the arching on the inside of the top plate, then use that wood so the sound is transmitted as much as possible along the continuous wood fibers {for best sound transmission.}
 ... Notice how the natural edge crack (that follows the grain runout) is about perfect for this purpose (compared to a bass bar which shows the inside shape of the top plate.)
..The most important things are the proper Wood Tone scale wood with a # 22 Rub tone... most important!
... Here I am laying out the cut so that the center curve will be in the correct location along the length of the bass bar.
... Viewed from the end of the bass bar, the tree growth rings should be exactly vertical, which is called 'quarter sawn'.
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end view
... For bass bar size, an overall length of 10 1/2" with a 5 mm thickness. The bass bar is shaped, glued in place, and then the contour / height is finished to give and even 176 HZ tap Tone
...I am now recommending that you select quarter sawn, spruce bass-bar wood that has a "rub-tone" of # 22 and on exactly on the Wood Tone scale {at least 198 HZ, and possibly 213 HZ or 242 HZ}
.. Please see articles on Rub Tone and Wood Tone else where on this web site...
Modified 9/2017
Page O16C_50
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