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Determining alternate bracing sizes http://w-ww.luthiersforum.com/forum/viewtopic.php?f=10101&t=40741 |
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Author: | Dave Baley [ Tue Jun 25, 2013 10:15 am ] |
Post subject: | Determining alternate bracing sizes |
As part of my repair learning process, I bought a mid 70's made in Japan classical guitar that had a lot of issues (top separating from the sides, all the braces loose, etc, etc). I have pulled the neck and removed the top in preparation for all the brace work. The top is laminated and ladder braced. I am thinking I would like to replace the lower bout ladder brace with fan braces. Does anyone have a suggestion on how to determine the correct size of the braces for such a top? I could follow the standard size in Cumpliano but that seems too heavy for a laminated top. Dave |
Author: | PeterF [ Tue Jun 25, 2013 10:25 am ] |
Post subject: | Re: Determining alternate bracing sizes |
Glue them on oversize and carve them down until it makes a nice sound when you tap it. As far as I can put it into words, it should go 'boom' rather than 'bong' - ie, it should sustain for a while. It should sound fairly similar all around the lower bout and 'tighter' above the soundhole where it needs to be braced stiffer. |
Author: | Mike Collins [ Tue Jun 25, 2013 12:21 pm ] |
Post subject: | Re: Determining alternate bracing sizes |
Being a learning process I'd replace the top with a solid wood one with whatever bracing you want to use. |
Author: | Dave Baley [ Tue Jun 25, 2013 6:29 pm ] |
Post subject: | Re: Determining alternate bracing sizes |
Mike I considered it but it is just too much of a leap at this point. I am not set up yet for making tops. I don't have a shooting board, my planes aren't sharpened and setup yet, I don't have a thickness gauge set up and I don't have any binding capability. I fully hope to be ready for this some day but just not yet. With all the things I am working on for repair stuff, builidng tops is further down the list. I am going to use HHG to put this top back on though so as a future practice for top building it will still be available. Thanks for the suggestion Dave |
Author: | Alain Moisan [ Tue Jun 25, 2013 7:16 pm ] |
Post subject: | Re: Determining alternate bracing sizes |
To be honest Dave, if any of us has any pertinent experience in bracing cheap plywood japanese classical guitar, they probably won't say it out loud... ![]() |
Author: | Dave Baley [ Wed Jun 26, 2013 10:41 am ] |
Post subject: | Re: Determining alternate bracing sizes |
oops. Sorry if I offended anyone. I think I will just glue the loose brace back down and move on and leave the bracing until I have something worth the time to do it and I am ready for it. "Newb" Dave |
Author: | Alain Moisan [ Wed Jun 26, 2013 10:51 am ] |
Post subject: | Re: Determining alternate bracing sizes |
Dave Baley wrote: oops. Sorry if I offended anyone. I think I will just glue the loose brace back down and move on and leave the bracing until I have something worth the time to do it and I am ready for it. "Newb" Dave Don't get me wrong Dave. I'm sure no one has been offended at all. I was just trying to make a joke. I guess I'm better at making guitars than making jokes (I hope...). |
Author: | Pmaj7 [ Wed Jun 26, 2013 11:13 am ] |
Post subject: | Re: Determining alternate bracing sizes |
I bet you could find a local luthier to join and thickness a student grade top for cheap (OLFers?). With any lam trimmer, you could make your own circle cutter for a rosette and use a flush cut bit with a smaller bearing to give you a 1/16 inch binding channel. |
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