Welcome to my Archtop Guitar Project Blog

The Archtop, or "Jazz Box", is a unique style of guitar. It has a complex design, and a sound that one might say can only come from such a design. Having never built a guitar of any kind before (unless you consider a ukulele to be a guitar) I have decided to jump right in up to the neck and start with the archtop. When I tell this to people, the normal response is something like, "have you ever built a guitar before?" or "so, you have a pretty good idea how to do this, right?". My usual reply is, "nope". I do, however, make a point to assure them that I have built many kinds of things, using many different materials, and I consider all constructions to have a logical and understandable process.

So, if you're interested in "newbe" projects like this, then grab a fresh cup of coffee or tea and follow along. The earliest post shows the design I'm going for.

**UPDATE TO INTRODUCTORY TEXT** You will see as the posts progress from earliest to newest that a few modifications and compromises have been made. As with all learning experiences, this project has allowed me to work out any problems with a design that have not been foreseen on paper. I also welcome any input from readers/followers who have some experience in either building or playing guitars that will point out potential problems.

Tuesday, September 27, 2011

Shaping the neck.

I put the oak face on the head stock before doing the cut out work, as I wanted to be certain of exactly where the forward-most surface of the head would be as I shape the neck.
The shaping is the part I've been dreading most, and I still have more work to do, so the nail-biting isn't over yet. I actually got a fair bit done on the basic shaping today. I have the taper toward the head end cut, which I did with the use of a simple jig I made in about two minutes. It's just a piece of wood that I attached the neck onto, face down (through a couple tiny holes in spots that would either be lost to trimming or easily filled and hidden). The neck was fixed at the correct angle along the length of the board so that when it was put through the table saw it cut the taper (second picture). The fence has been moved in the photo, but all I did was set it up at the correct width on either side, one at a time, and carefully pushed it until it reached the desired stopping point. The excess was trimmed away carefully and gradually with the saw blade set very low, nibbling into the curved sides toward the head stock. I stopped the long cuts short of the head because the cut needs to curve outward there.
The curve at the heel was rough cut on the table saw as well. This will also need to be refined with other cutting tools, but it's better than having to start going it with all that wood down there.
The thickness of the head has been trimmed down on the table saw as well (no pics of that here, but I have some I can post later).
The final picture shows the profile of the rough neck and the oak head stock face before I glued it on.
Next post I will talk about the angle of the neck, and the particulars of the neck block I ended up making (out of oak).

Thursday, September 22, 2011

Carving the spruce top.

I never ended up getting spruce billet for the top. Instead, I decided to just go with some lumber and re-saw it so it was quartersawn*. I had to laminate a lot of strips together to get the width (narrow boards), but I read somewhere that this may not affect the tone as much as some might believe - I guess we won't know 'til it's done. I'm not interested in getting the perfectly clear look with no "imperfections" that many luthiers favour. I much prefer the "real wood" look that comes from grain streaks and knot shadows.
At any rate, the top picture is carving in progress. Notice the cool little brass plane. This has a rounded bottom to allow for scooping out contours like those around the edges, and inside.
Further along, you can see in the second picture how I've refined the curves and made it a more gradual incline toward the centre.
The inside is currently being refined to match the outer contours I have settled on.
*For those who are wondering what "quartersawn" is - this effectively refers to the direction the grain is going. In a softwood guitar top, you want the grain to be oriented up and down (as you look at the end of the wood), rather than side to side. This makes for a stronger and more stable top than if cut the other way. This is why you almost always see a tight, narrow grain running end to end on a guitar top. Almost all lumber is cut flatsawn, which is simply cutting the log into slabs. The slabs from near the centre may be effectively quartersawn on the outer extremes because of how the grain is running, but most of it runs laterally, or close to it.

Tuesday, September 6, 2011

Spruce Top, Under Way

I've only just gotten the spruce ready to be shaped for the top. Nothing to show yet, really. As it progresses I'll get pics and talk about it. I'll start off by saying there are a number more seams than I had hoped, but I read somewhere that somebody made a guitar with 10 seams in the front and he claims it didn't affect the sound. Let's just put that to the test.