Hi all, I'd like to get some input on how to address this top blowout. For starters I own this, I got it as a project guitar, 71 D28. I'm not as experienced with acoustics as electrics and this is a big project but I got it to learn new skills and I'm confident I can do it with guidance. It had been stored in the case for many years under tension and was way too humidified. The bridge had pulled up I assume in stages. The center seam se…
Chris, can I add this for the council of elders show ? Also, we are going to have @member on pretty soon to talk about a job about this dramastic. Here's a link to the live show co…
I was finally able to model something like a Gibson L7 top plate! Now I'm trying to build my f-holes... My only reference is the Benedetto archtop book, where it puts a few rules of thumb about how the f-holes should be placed. My question is, how precise are we talking here? One of the rules of thumb is that the bridge intersects at the midway point of the f-holes. Does this imply that the f-holes are at a certain location on the plate,…
Possibly answering my own question...given my current drawing, there is 11.157" from the f-hole point I chose to the end of the body. If you assume that's the 14th fret, it implies a 26" scale length…
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Initial frequency analysis of this D28 copy (done with a temporary 35g bolt-on bridge and the back plate taped on) is VERY LOW. Main air resonance 83.5hz and top monopole 156.6. It's standard Martin scalloped X-bracing with a torrefied Adirondack top. Since I can still easily access the bracing, I'm thinking of going in and laminating wood on top of the X brace to stiffen it. Other options would be a very light bridge, though I'm not…
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Update: Turns out it's not impossible to raise the frequencies. Removing the 35g temporary bridge raised the air resonance 2.1 hz and top monopole 2.6 hz, so a lighter bridge could help a bit. Fill…
We hear a lot in LoothLand these days about 3D printing. I think it's an awesome use of that technology for what we all do. With my long history with AutoCad and 3D rendering in my previous life, I should pull the trigger on a 3D printer, but I'm just not ready yet AND I have no available space for one in my little shop or in my office right now. Yes, 3D printing is great, but sometimes, good ole regular printing can be a surprise frien…
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