Posted on March 13, 2020May 22, 2025 by Dale Phillips Commercial Graphite Acoustic Guitars Commercial Graphite Acoustic Guitars by John A. Decker, Jr. Originally published in American Lutherie #31, 1992 and Big Red Book of American Lutherie, Volume Three, 2004 Why would anyone want to build an acoustic guitar of graphite? The primary reason is that wooden acoustic guitars (particularly good ones) are fragile. They are especially prone to cracking, warping, and joint separation due to heat, humidity, and water. Graphite/epoxy technology — properly employed, which isn’t easy — can maintain the sound quality of a wooden guitar while completely removing its susceptibility to heat and moisture. During the past seven years Kuau Technology has been working with luthiers at the firm of Pimentel & Sons, of Albuquerque, New Mexico, in the development of acoustic guitar technology employing fiber-reinforced resins, particularly graphite/epoxy. Our approach has been to duplicate as closely as possible, panel by panel, the acoustic properties of fine wooden classical guitars, rather than attempt to reinvent the guitar de nova. This work has resulted in the development of the RainSong® Graphite Acoustic Guitars,* which we believe to be the first commercially available all-graphite acoustic guitars. Become A Member to Continue Reading This Article This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. If you are already a member, login for access or contact us to setup your account.
Posted on March 2, 2020May 16, 2025 by Dale Phillips Free Plate Tuning, Part Three: Guitars Free Plate Tuning, Part Three: Guitars by Alan Carruth Originally published in American Lutherie #30, 1992 and Big Red Book of American Lutherie Volume Three, 2004 See also, Free Plate Tuning, Part One: Theory by Alan Carruth Free Plate Tuning, Part Two: Violins by Alan Carruth The guitar is somewhat simpler acoustically than the violin, and perhaps more limited. As a result it has evolved into a number of more or less specialized forms to suit different musical uses. It is difficult to imagine a guitar that could “do it all” the way a good violin can. Rather, each guitar seems to have a “center,” a sound that is characteristic of it that suits it for a particular style or player. Good guitars do have a wide dynamic and timbral range, but they always retain their characteristic sound. As I see it, a good part of the art in this game is deciding where you want the “center” to be, or, alternatively, how to get the “center” you want out of a given shape or set of wood. And then you want to have a broad dynamic and expressive range, good balance, and clarity or resolution; the ability to distinguish things like inner lines. No amount of acoustic science is going to tell you what priority to put on the different characteristics of the sound, nor whether you have succeeded in the end. But if you know what you’re doing, an oscillator and a jar of glitter can help you get the sound you want. One of the main simplifying factors between the guitar and the violin is the lack of a soundpost in the guitar. This allows the top and the back to be more independent; in acoustic terms they are not so tightly coupled and can act out of phase. Become A Member to Continue Reading This Article This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. If you are already a member, login for access or contact us to setup your account.
Posted on December 16, 2019June 11, 2025 by Dale Phillips Dissolving the Mysteries Dissolving the Mysteries by Graham Caldersmith previously published in Guild of American Luthiers Quarterly Volume 10, #4, 1982 and Big Red Book of American Lutherie Volume One, 2001 We live in confusing times where progress in understanding the natural world, and in manipulating nature to our advantage has spawned an ever-changing technological environment that seems beyond our own control, and even beyond our comprehension in its scale and complexity. We are beginning to see organized reaction against technological excess, and movements towards simpler ways of living. Most luthiers are aware that the practical and traditional practice of lutherie is being analyzed and even supplemented by scientific methods, and some feel that the dignity and integrity of the traditions are therefore threatened as we redefine and dissolve the mysteries of lutherie. I would argue that the greatest system of lutherie to date, the Renaissance-Baroque school of violin making emerged in times of devastating plague and recurring war, when the orthodoxy of creation and nature was being challenged by Galileo and Copernicus in centers not far from Brescia, Cremona, and southern Germany. In fact we know that because the centers of Baroque violin making lay on the trade routes through which the latest news in science, art, and technology flowed with trade merchandise. The great masters of lutherie would have been exposed to new concepts in vibration, pitch, and wave motion which they would find difficult to ignore in their experience of wood vibration at the workbench. How they dealt with it is not recorded, but that they produced unsurpassed masterpieces in bowed instruments is undisputed. Contemporary luthiers live in times of social upheaval, war, and pollution, but also with a growing body of knowledge about the function of the instruments they make. It remains to be seen how we will react to this environment, but already we have seen a variety of new designs for the guitar, and the vital interaction of luthiers with pioneering guitarists. Become A Member to Continue Reading This Article This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. If you are already a member, login for access or contact us to setup your account.
Posted on July 31, 2019May 23, 2025 by S Mc Herr Helmholtz’ Tube Herr Helmholtz’ Tube by Mike Doolin previously published in American Lutherie #91, 2007 See also, “There’s a Hole in the Bucket” by Cyndy Burton “Sideways” by John Monteleone “Three Holes are Better than One” by Robert Ruck Design innovator Mike Doolin tried an interesting experiment. Mike’s guitars have the distinctive double-cutaway feature and they don’t lend themselves to a port up in the neck/cutaway region for reasons of underlying structure. So Mike put one in the lower bout and very unexpectedly found his Helmholtz resonance had raised something like a major third. He felt that compromised the responses of the guitar. His solution was to “tube it.” The side was ported before I assembled the guitar. After gluing the back on, I realized the change in the Helmholtz when I tapped on the guitar with the port open. It seemed obvious that a shift of a major third up was going to radically change the sound of the guitar, probably killing most of the bass response. I knew that ports in bass reflex speakers are often tubes, where the longer the tube the lower the resonant frequency. I also knew that the tube could be either inside or outside the box. So I initially held a roll of toilet paper against the port, letting the cardboard core of the roll form a tube that extended the port. That dropped the main air resonance back down, showing me that I was on the right track. Then I turned a tube of wood on my lathe to fit the hole and experimented with the length until the air resonance moved less than a half-step with the port closed or open. I recall the port being 1 1/4" in diameter and the tube being about 2 1/4" long, but that’s just from memory. Become A Member to Continue Reading This Article This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. If you are already a member, login for access or contact us to setup your account.
Posted on June 20, 2019May 28, 2025 by Dale Phillips Guitar Swap! Guitar Swap! guitars and text by John Calkin and Steve Kinnaird previously published in American Lutherie #81, 2005 John Calkin: When I suggested to Texas luthier Steve Kinnaird that we build each other a guitar I had no specific agenda in mind. Though I spend my work weeks building acoustic guitar bodies for Huss & Dalton, I feel it’s important to build an occasional complete instrument just to keep in practice. Company policy prevented me from building flattops for sale but not from building for trade or gift. And frankly, I had enough nice guitars sitting around the house that I didn’t feel like building another for myself. Trading guitars with Steve sounded like fun. We were already good friends who trusted each other, and we knew each other’s work well enough to know that we were on equal footing as luthiers. Most of the fun for me was in not telling Steve what I wanted or expected in my guitar. He, too, decided that surprise would be the most delicious element of the swap. Become A Member to Continue Reading This Article This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. If you are already a member, login for access or contact us to setup your account.
