Ahmedivarius Posted December 24, 2017 Report Share Posted December 24, 2017 Hi everybody, I need your opinions about the bass bar. I am making a new violin, form model is Guarneri Kreisler 1733. My used sound plate wood is 20 yearly, very dry but very soft and flexible on X and Y axis. My used thicknesses are on middle 33 mm and on the top and end 25-26 mm. And sound plate is 62 gr. The structure of the veins are narrow (1-1.2 mm), flat and regular. (I will add photos) Now, I think about the bass bar making. I have to make a strong bass bar, but the bass bar won't interfere with the flexible of the top plate. So, I did make bass bar thickness 6 mm. And I think I'll make the highest point 12.8 mm and end portions 3,8 - 4 mm. But, So, while this is the case, how can I make te bass bar form shape ? I saw on luis claudio manfio's violin, he make a flat shapes bass bar. Is that what I should do? or any different shapes, or original ? Quote Link to comment Share on other sites More sharing options...
chungviolins Posted December 25, 2017 Report Share Posted December 25, 2017 This is what I do. 1. Find the midpoint of the stop (195mm from the edge next to the neck) and center of the bass bar, call it M. 2. Find the midpoint of the upper end point of the bass bar and the point M, call it A. 3. Find the midpoint of the lower end point of the bass bar and point M, call it B. This is the measurements using a thickness caliper including the top thickness. M : 14.5 - 15 mm A, B : 10.5 - 11 mm End points (upper & lower ) : 5.5 mm 4. Connect the points with a smooth curve. ( slightly concave , then flattish broad convex and slightly concave again) You adjust the numbers depending on the tap tones and flexibility of the plate. Hope this helps, Koo Young Chung Quote Link to comment Share on other sites More sharing options...
chungviolins Posted December 25, 2017 Report Share Posted December 25, 2017 https://www.google.com/search?q=bass+bar+shape&client=tablet-android-samsung&prmd=simvn&source=lnms&tbm=isch&sa=X&ved=0ahUKEwie4MnAj6XYAhUC3IMKHcNTCOAQ_AUIEigC&biw=768&bih=1024#imgrc=z4g5nC5Obde0jM: The numbers are different than mine, but it will give ideas about the general shape. KYC Quote Link to comment Share on other sites More sharing options...
Davide Sora Posted December 25, 2017 Report Share Posted December 25, 2017 Give it an elegant shape, at least.... ......so that it can give back an elegant sound. Quote Link to comment Share on other sites More sharing options...
Ahmedivarius Posted December 26, 2017 Author Report Share Posted December 26, 2017 (edited) This system seems very logical =) Thank you for answer. Edited December 26, 2017 by Ahmedivarius Quote Link to comment Share on other sites More sharing options...
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