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: Dmitry Zhevlakov Meet the Maker: Dmitry Zhevlakov by Federico Sheppard Originally published in American Lutherie #89, 2007 I first became acquainted with the name of Russian luthier Dmitry Zhevlakov when I received an inquiry from a guitar maker looking for veneers to duplicate one of his famous rosettes. After some research, I discovered that Dmitry is well known in some parts of the world, such as Paraguay and Australia. In the Soviet days, Dmitry’s family was extremely limited in who they could do business with, but the Internet has done wonders to increase his contacts. Although I attended medical school in Russia before the iron curtain came down, I don’t really speak Russian. Dmitry and I communicate through a translation program, and sometimes interpreters. And his English is getting better all the time. I was impressed with Dmitry’s guitars as well as his decorative work. I decided to visit his shop in Tula, Russia. And when the guitarist I was traveling with had his guitar damaged by the airline, I found that Dmitry’s skills extended to guitar repair too! 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 Mechanical Compliance for Soundboard Optimization Mechanical Compliance for Soundboard Optimization by David Hurd from his 2006 GAL Convention workshop Originally published in American Lutherie #90, 2007 People say, “You’ve got to make fifty or a hundred guitars before you get it right.” That makes me crazy. I feel that if you can do the carpentry of putting an instrument together and have idea of what it should look like, you can get 80% or 90% of the way there in terms of top optimization with a mechanical compliance approach. I build many sizes of guitars and ukuleles using different top woods. I have developed an easy method of testing the compliance of a top, that is, how far it flexes under a given force, with a simple fixture. Being able to measure and compare the compliance values has proved to be a very useful thing in optimizing these soundboards for the best sound and stability when I graduate the edges of the tops and carve the braces. After building and measuring many instruments, I have developed a mathematical model that does a very good job of estimating what the target compliance measurements should be for a given instrument size and string tension. I have integrated the model into a spreadsheet which you can use by plugging in just a few simple measurements. 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 13, 2024May 14, 2025 by Dale Phillips Blackshear/Nagyvary Guitar Blackshear/Nagyvary Guitar by John E. Philpott Originally published in Guild of American Luthiers Quarterly Volume 12, #2, 1984 Anybody that has heard a guitar built by Thomas Blackshear is already aware that he builds world-class instruments, but this time it was something special. I was asked to be the Master of Ceremonies at a concert that would introduce to the world a guitar built by Tom, in collaboration with Dr. Joseph Nagyvary, a biochemist who had recently gained a great deal of attention by claiming, then demonstrating, that he had rediscovered the processes of the Cremona Masters. This, I was told, would be a Stradivarius guitar! Naturally, I approached the matter with a mixture of enthusiasm and hardboiled scientific skepticism. My introduction to the guitar was over the telephone (yet!) and I was already quite impressed. A subsequent call from guitarist Terry Muska who told me that we would not be needing a microphone at the concert whetted my appetite further, and when I heard a preview of the instrument, all of my reservations were gone. The story really began about a year ago when biochemist, Joseph Nagyvary (Professor of biochemistry and biophysics, Texas A&M University) discovered that the wood from the Stradivari and Guarnari instruments was remarkably different from that of the more modern instruments, in that the tubes that comprise wood (xylem) were not plugged with dried pectin. Furthermore, the chemical composition of the open-tubed Cremona instruments was very different, and that the wood was much stiffer and less elastic than more modern instruments that have been built in the last 350 years. 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.
