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| Sound Port Reinforcement - What Do You Do? http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=30603 |
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| Author: | dberkowitz [ Thu Jan 06, 2011 8:51 am ] |
| Post subject: | Re: Sound Port Reinforcement - What Do You Do? |
Todd, I do a cross grain patch, as thick as the side, full height, going at least an inch on either side of the port. I have a mating caul and epoxy it in place. Kerfing goes on top of the patch. I don't open the port until after the guitar is bound because I use the luthiertool rigs which I find do a much better job particularly on wedged guitars. |
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| Author: | douglas ingram [ Thu Jan 06, 2011 9:34 am ] |
| Post subject: | Re: Sound Port Reinforcement - What Do You Do? |
Two layers of 6oz. fiberglass set with epoxy. Light weight, easy to do, and strong. Works for me. There really IS fiberglass on the side in the photo! |
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| Author: | Laurent Brondel [ Thu Jan 06, 2011 10:10 am ] |
| Post subject: | Re: Sound Port Reinforcement - What Do You Do? |
I shape a round piece of hardwood, most likely the same as the bindings, and glue it with matching purfling scheme. I drill with a forstner bit before gluing the plates. I've been experimenting with diameter and thickness, visually, not sure it makes a difference tonewise. |
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| Author: | Dave Stewart [ Thu Jan 06, 2011 10:32 am ] |
| Post subject: | Re: Sound Port Reinforcement - What Do You Do? |
On the only one I've ever done, I used a .040" blk/ .020" maple (full width) ply lam on the inside, intending that it would also add a subtle "purfling" accent when cut out. |
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| Author: | Rick Davis [ Thu Jan 06, 2011 1:11 pm ] |
| Post subject: | Re: Sound Port Reinforcement - What Do You Do? |
Essentially the same as most -- laminates that pretty much equal the thickness of the side, extending to the linings top and back. I do not use a cross-grain laminate due to (probably unnecessary) concern about expansion/contraction. I frequently use a contrasting veneer to match the purfling. The fiberglass laminate is cool! Not sure I'd do it but it makes a LOT of sense. |
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| Author: | woody b [ Thu Jan 06, 2011 7:47 pm ] |
| Post subject: | Re: Sound Port Reinforcement - What Do You Do? |
Rick Davis wrote: ..................................................................................................I do not use a cross-grain laminate due to (probably unnecessary) concern about expansion/contraction. .................................................................................................................. The only side crack I have on where I used a cross grain laminate. The crack's only 1/8" long, and isn't going anywhere, but it's there. I now use a....double side from the neck block to the waist when I'm going to install a soundport. I'll get a picture tomorrow. |
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| Author: | Zach Ehley [ Thu Jan 06, 2011 9:32 pm ] |
| Post subject: | Re: Sound Port Reinforcement - What Do You Do? |
Ive done both laminated veneers as well as a solid piece same thickness as the side. |
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| Author: | woody b [ Sat Jan 08, 2011 3:59 pm ] |
| Post subject: | Re: Sound Port Reinforcement - What Do You Do? |
Forgive the bad photography. Here's a picture of the soundport crack on the guitar with the cross grain reinforcement. It's hard to see, so I drew and arrow pointing toward it. Attachment: soundport crack.JPG Here's what I'm doing now for reinforcement. The reinforcement goes from the neck block to the waist. (The guitar isn't finished, I'll clean it up inside, and erase the pencil marks) Attachment: soundport reinforcement.JPG Attachment: soundport reinforcement (1).JPG
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| Author: | Christoph [ Sun Jan 09, 2011 4:09 am ] |
| Post subject: | Re: Sound Port Reinforcement - What Do You Do? |
After Xmas I made my first soundport. Attachment: DSC03748-2.jpg Back&sides of this GC are Cocobolo; inside the box is lots of Mahogany. So I thought it would give it a nice touch by reinforcing the soundport with Mahogany and Cocobolo. Including the side it ads up to a solid .24". Attachment: DSC03749-2.jpg
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