Restoration of a 1931 Martin 00-17

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Re: Restoration of a 1931 Martin 00-17

Postby Barry Daniels » Mon Jul 01, 2019 9:37 am

Since this guitar came in with a replacement top, I searched far and wide to find a bracing layout. This drawing is the only one I could find for a 00 size 12-fret Martin. It is not very clear but it seems to be accurate. The outline of the plan fit my body outline almost perfectly.
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1935 00-21 # 60800.jpg
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Re: Restoration of a 1931 Martin 00-17

Postby Chuck Tweedy » Mon Jul 01, 2019 10:46 pm

looking good!
I have the Carruth scraper as well - mine needs sharpening :-(
its great when it is sharp (and it stays sharp a LONG time)
Likes to drink Rosewood Juice
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Re: Restoration of a 1931 Martin 00-17

Postby Bob Francis » Fri Jul 05, 2019 2:06 pm

Chuck Tweedy wrote:looking good!
I have the Carruth scraper as well - mine needs sharpening :-(
its great when it is sharp (and it stays sharp a LONG time)


Thanks! I had seen these and didn't realize Mr.
C was the creator.
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Re: Restoration of a 1931 Martin 00-17

Postby Barry Daniels » Sat Jul 06, 2019 6:21 pm

Gluing in the end blocks.
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Re: Restoration of a 1931 Martin 00-17

Postby Barry Daniels » Sat Jul 06, 2019 6:25 pm

Marking the sides to establish the contours on my radius dish. First I placed a block under the bottom block to get it level with the head block and then put a wedge under one side to level the rims side to side. Then I glued a small block to a pencil and traced a line following the radius dish.
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Re: Restoration of a 1931 Martin 00-17

Postby Barry Daniels » Sat Jul 06, 2019 6:29 pm

Then adding the fabric side reinforcements with HHG. And on top of that goes the spanish cedar kerfing.
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Re: Restoration of a 1931 Martin 00-17

Postby Barry Daniels » Thu Jul 11, 2019 8:58 pm

On to bracing the back. First up is the back graft made from cross grain strips off a spruce top that are 3/4" wide. The joints of the strips are located at intersections of the braces which will be cut away. I made a 3-1/2" diameter sanding caul out of a piece of plastic duct to meet the Martin spec for the back graft.
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Re: Restoration of a 1931 Martin 00-17

Postby Barry Daniels » Thu Jul 11, 2019 9:00 pm

Now the braces get attached with HHG and a forest of go-bars.
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Re: Restoration of a 1931 Martin 00-17

Postby Gordon Bellerose » Thu Jul 11, 2019 10:38 pm

Barry Daniels wrote:Yes, the scraper is great. I have the square one also. However, you need to have a fine grinding wheel in order to sharpen them.

I also use both of those scrapers. I agree that they are quite good.

If you can find someone who sharpens hockey skates, they will have the "hollow ground" stone needed to sharpen these.
I don't know, but perhaps a skate blade was part of the inspiration for Mr. Carruth.
I need your help. I can't possibly make all the mistakes myself!
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Re: Restoration of a 1931 Martin 00-17

Postby Barry Daniels » Thu Jul 11, 2019 11:50 pm

Carved and sanded the braces. And then applied The Brand.
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Re: Restoration of a 1931 Martin 00-17

Postby Gordon Bellerose » Fri Jul 12, 2019 5:51 pm

Wow Barry! Where did you get that brand?
I need your help. I can't possibly make all the mistakes myself!
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Re: Restoration of a 1931 Martin 00-17

Postby Aaron Helt » Fri Jul 12, 2019 6:46 pm

Maybe he shouldn’t tell us, we’ll all start building Martins.:)
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Re: Restoration of a 1931 Martin 00-17

Postby Barry Daniels » Fri Jul 12, 2019 6:50 pm

There are folks on Etsy that make custom brands really cheap. This one cost me $20 plus shipping. I got a photo off Google Images of the brand, sized and cropped it and sent it to them. Took about 3 weeks. Quality was impressive. I doubt that I will ever use it again but this unusual project was deserving of the slight cost and extra trouble. If anyone ever has a similar legitimate need for this brand, I would be happy to pass it on.

I am thinking of getting one made for my own name. Sort of a label that will never get separated from the guitar.
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Re: Restoration of a 1931 Martin 00-17

Postby Aaron Helt » Fri Jul 12, 2019 8:58 pm

I think that’s a great idea. Got me thinking.
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Re: Restoration of a 1931 Martin 00-17

Postby Barry Daniels » Mon Jul 15, 2019 11:30 am

My process of attaching the back starts with "Driving the Bus" with my motorized dish. Then I locate the back onto the rims and mark the locations of the back braces for notching the kerfing. This time I did something different and used small pieces of masking tape stuck onto the kerfing with the edges of the tape just touching the sides of the braces. When I lifted the back off, the tape gave me a very accurate guide for making razor saw cuts. This seemed to work well, but it won't work when attaching the top because the box will be closed.

To mark the back braces where they are to be cut I have a little piece of a pencil glued to a popsicle stick to trace the face of the sides. Then I make a calculation of how far to cut inside this line.
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Re: Restoration of a 1931 Martin 00-17

Postby Barry Daniels » Mon Jul 15, 2019 11:34 am

I cut the end of the braces off and carefully cleaned up the glue residue. (Since there will be no binding on this guitar I am attempting to get a perfect joint on the plate to rim joints.) Glued the back on with the assembly sitting in the radius dish and with some 5/16" diameter, shortened, fiberglass go-bars. I have used this method quite a few times in the past but I did not get the perfect joint this time. A very slight gap in a few places. Not bad enough to attempt a re-do, but it did appear to be enough for me to reevaluate my tools. I am going to build a bunch (50) of special sized cam clamps to do future plate attachments.

Cleaned up the boat and will be starting on the top next.
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