Posted on June 30, 2024May 6, 2025 by Dale Phillips Radiation from Lower Guitar Modes Radiation from Lower Guitar Modes by Graham Caldersmith Originally published in American Lutherie #2, 1985 and Big Red Book of American Lutherie, Volume One, 2000 Since 1982 when I attended the Estes Park GAL Convention, and subsequently wrote about “Dissolving the Mysteries”1 (of guitar behavior — perhaps a presumptuous title), as a distant but faithful member of GAL, I have followed the developing discussions in the Quarterly about guitar top and back vibrations, how they are excited by the plucked strings and how they generate sound. At our January 1985 Australian Association of Musical Instrument Makers Convention (featuring strong GAL membership) the geometry of the lower vibrational modes of guitars and their appearance in the guitar frequency response records was keenly debated by practicing guitar makers, amply demonstrating luthiers’ adoption of scientific knowledge as part of their working repertoires. Tom Rossing’s contributions to GALQ2, 3 the thoughtful articles by Paul Wyszkowski4, 5, 6, 7 and the monumental “Kasha Guitar Soundboard”8 by Gila Eban, together with some detailed correspondence to me from Gila on her development of the Kasha soundboard all indicate the integration of guitar physics into guitar evolution. I think such unification of science, art, technology (and good ol’ workbench cunning) is healthy and fosters excellence. Become A Member to Continue Reading This Article This article is part of the Articles Online featured on our website for Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 3 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. MEMBERS: login for access or contact us to setup your account.
Posted on June 30, 2024May 14, 2025 by Dale Phillips Meet the Maker: Mervyn Davis Meet the Maker: Mervyn Davis by Rodney Stedall Originally published in American Luthier #90, 2007 I first met Mervyn in 1998 at his old farm shed workshop in the countryside just outside Pretoria. I had just started my first instrument and had a need to ask questions of someone with experience in building stringed instruments. I found Mervyn to be a deep thinker, very knowledgeable, and willing to share with me the answers to my questions. Mervyn’s knowledge and insight into stringed instruments stems from many years of self-inspired building and innovation. Most South African luthiers like myself can claim to have gone through the Mervyn Davis school at some stage of their building career. The interview below serves to prove Mervyn’s willingness to share his years of experience freely with others. Mervyn, you have thirty-plus years of stringed instrument building experience. Can you tell us what instruments you have made? Guitars, violins, lutes, electrics, archtops, and mandolins of every description. But there are hundreds that I will regretfully never get around to making. My curiosity is still drawing me deeper into the endless well of questions and answers that experimentation offers and which, I am sure, is exactly what got all of us luthiers into the craft to begin with. Become A Member to Continue Reading This Article This article is part of the Articles Online featured on our website for Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 3 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. MEMBERS: login for access or contact us to setup your account.
Posted on June 30, 2024May 14, 2025 by Dale Phillips Grading on the Curves Grading on the Curves: Fitting Bars and Bridges on Archtop Guitars by Steve Andersen from his 2006 GAL Convention workshop Originally published in American Lutherie #91, 2007 The first thing I’ll show you today is how I fit tone bars to the top. Then I’ll talk about fitting the base of a bridge to a top, first with this router jig that indexes off the top and gets me really close to the final shape, then moving on to the final fitting. I brought some extra materials if anyone wants to try hand-fitting an ebony bridge or a tone bar. I use the term tone bar, because I think of braces as being structural. If you built a flattop guitar without braces, it would just fold up. An archtop could be built without braces and it would hold up fine. The archtop’s bars are not so much for structure, so I call them tone bars. One thing that helps me in the fitting process is that my arching is very consistent from guitar to guitar. The arching templates for my guitars started out based on a D’Angelico New Yorker, and have evolved over the years to what I’m using today. So while I have several body sizes, they have similarities based on what I’ve found works well for my sound. Become A Member to Continue Reading This Article This article is part of the Articles Online featured on our website for Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 3 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. MEMBERS: login for access or contact us to setup your account.
Posted on June 30, 2024May 14, 2025 by Dale Phillips The Guitar as a Structure and Some Practical Information on Bracing The Guitar as a Structure and Some Practical Information on Bracing by James Blilie Originally published in American Lutherie #100, 2009 Why does the neck of the guitar break at the nut when dropped off the stage? Why does the bridge sometimes pull off a guitar? Why does the neck of a guitar sometimes need to be reset? Why does a really thick guitar top give less bass response than a top of more typical thickness (a thinner top)? These are questions that are — primarily — structural. I have seen many ideas on the structure of guitars in print that are simply wrong. I am a structural engineer and have been working in the civil engineering, aviation, and medical device industries for twenty-five years. My engineering work has been, in essence, ensuring that structures are strong (or stiff) enough. I am also a guitar maker since 1998 (I’m building my fifty-ninth guitar) and a fingerstyle guitar player. I have found that my engineering experience has helped my guitar building in many ways. This is my $0.02 worth as an experienced structural engineer. Become A Member to Continue Reading This Article This article is part of the Articles Online featured on our website for Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 3 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. MEMBERS: login for access or contact us to setup your account.
Posted on June 13, 2024May 6, 2025 by Dale Phillips Experimental Violin Acoustics Experimental Violin Acoustics by George Bissinger from his 1984 GAL Convention lecture Originally published in American Lutherie #7, 1986 and Big Red Book of American Lutherie Volume One, 2000 It was a pleasure to discuss the “secrets” of violins at the kind of meeting that would scarcely have seemed possible in the time of the legendary Cremonese luthiers. As a member of the Catgut Acoustical Society, which is devoted to all aspects of bowed string instruments from the raw materials (gut?) to the finished product (cat?) and its sound (meow?), I can only welcome this shared discussion. The Society has sponsored the construction of a family of eight violins covering the frequency range of 41Hz to 1318Hz (lowest to highest open string), and has a demonstrated interest in all violin matters whether they are purely practical, subjective, and aesthetic, or purely abstract, objective, and quantitative. The talk I gave at this GAL meeting covered a range of topics concerning violins in which I personally have been involved. These topics leaned rather more to the concrete aspects of violin making such as working with student instruments, testing plates of unassembled (or humidity disassembled) instruments, plate archings, bassbar tuning, and humidity effects, but also included discussion of coupling between enclosed air oscillations and plate vibrations in the assembled instrument. 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.
