Posted on September 17, 2024September 18, 2024 by Dale Phillips Fall Collection 2024 Articles Online Fall Collection 2024 GAL Members – Login first before clicking on article titles to read the full articles. Not a 2024 member? You can join or renew here. Radiation from Lower Guitar Modes by Graham Caldersmith (1985) Caldersmith discusses the efficiency and pattern of sound radiation in the classic guitar produced by the four lower resonance modes, which he calls monopole, cross dipole, long dipole, and tripole. Inside Pacific Rim Tonewoods by Steve McMinn (1993) McMinn’s lutherie wood business has turned out to be a pretty big deal. Here we gain perspective by seeing it at the very beginning. The Great White Sitka by Jeffrey R. Elliott (1993) Holy Moby Spruce! How does one hack a log that’s eleven feet wide into 4000 guitar tops? Very carefully! By the way, this is a log that Steve McMinn rescued from the pulp mill. Meet the Maker: Bernard Millant by Jonathon Peterson (2006) Millant is a violin maker, a bow maker, an appraiser, an author, and a man of high repute within the violin world. The depth of training behind many old-school fiddle people will astonish most guitar makers, and it makes for entrancing reading. Meet the Maker: Dmitry Zhevlakov by Federico Sheppard (2007) This is not only the story of a Russian luthier who also makes beautiful rosettes for other builders, but is another example of how the Internet has changed the world — in this case for better. Aluminum Sonatas: A Brief History of Aluminum Stringed Instruments in the Last 120 Years by James Condino (2007) Every luthier knows how fickle and finicky the market is, so it’s no wonder that musical instruments made of aluminum didn’t catch on. Examined here are a violin, a mandolin, and a pair of bass viols. Fun stuff! Mechanical Compliance for Soundboard Optimization by David Hurd (2007) Hurd believes that the fastest way to great instruments is science, and it’s hard to argue with such a rational man. His jigs measure the deflection of top plates while under tension, and once he carves the top and braces to the numbers he wants, he’s done. This could be math heavy, but he offers an Internet spread sheet to ease the pain. Construction of the Colombian Tiple by Anamaria Paredes Garcia and R.M. Mottola (2007) Cross a 12-string flattop with a classical guitar and you get the Colombian tiple. The tiple has four courses of three steel strings, but on the inside, it’s a classical. Follow Alberto Paredes as he builds the instrument in this photo tour. See GAL Plan #51. Meet the Maker: Mervyn Davis by Rodney Stedall (2007) Davis’ South African upbringing inspires a wonderful decorative sense in his instruments. He’s built a ton of different stuff but may end up best known for his wildly unique modular guitars called Smooth Talkers. Cricket: A Reclaimed Salvage Recovery by James Condino (2007) Condino’s mandolin is made from recycled materials, mostly Douglas fir and katalox. It is unique and beautiful, and the story behind it is pretty cool, too. Grading on the Curves: Fitting Bars and Bridges on Archtop Guitars by Steve Andersen (2007) This is a very detailed look at how a notable builder of archtop guitars fits tone bars and bridges to his instruments. The Venezuelan Cuatro by Aquiles Torres (2008) Traditionally, this instrument is a small 4-string guitar with 14 frets clear, no frets over the body, a flush fretboard, and a large veneer tap plate. Note that the cuatro built for the article has 17 frets clear of the body. See GAL Plan #58. The MacRostie Mandolin Deflection Jig by Don MacRostie (2008) MacRostie’s clever jig measures the top deflection of a carved mandolin under string load at any stage of its construction. It is a valuable tool within the reach of any luthier. The “Corker” Guitar: A Sideport Experiment by Alan Carruth (2008) Carruth built a classical guitar with many small ports drilled in the side. By plugging the ports in various combinations he investigated the usefulness and physics behind them. Though this guitar did not make a believer out of him, he admits that his results are somewhat inconclusive. Electric Guitar Setup by Erick Coleman and Elliot John-Conry (2009) Two disciples of Dan Erlewine explain the latest techniques of setting up the electric guitar. All the details and specs are there, as well as a bit of philosophy. Dulcimer 101 by John Calkin (2009) Dulcimers are needlessly maligned and in need of advocates, and the author is a strong one. Tools and jiggery are kept to a minimum to make construction of this entry level instrument as accessible as possible. The Guitar as a Structure and Some Practical Information on Bracing by James Blilie (2009) A structural engineer and guitar builder sees the guitar as a thing buffeted by forces and stresses. Total Flame Out: Retopping a Harp Guitar by Harry Fleishman (2009) Harry replaces the failed soundboard on a complicated instrument with as little refinishing and other stress as possible. Strings: The (Often) Forgotten Accessory by Fan Tao (2010) D’Addario's resident scientist Fan Tao helps us understand string issues in relation to custom instruments and customized tuning. Practical Acoustics by Michael Cone (2010) Cone describes his advanced apparatus and method for acoustically testing classical guitars. Meet the Maker: James Ham by Roger Alan Skipper (2010) Ham operates from a shop in Victoria, B.C. where he repairs and restores violin family instruments and constructs world class double basses. It’s All About the Core or How to Estimate Compensation by Sjaak Elmendorp (2010) Mathematics and parameters used to address the problem of string compensation estimation. Articles Online Fall Collection 2024 Radiation from Lower Guitar Modes by Graham Caldersmith (1985) Caldersmith discusses the efficiency and pattern of sound radiation in the classic guitar produced by the four lower resonance modes, which he calls monopole, cross dipole, long dipole, and tripole. Inside Pacific Rim Tonewoods by Steve McMinn (1993) McMinn's lutherie wood business has turned out to be a pretty big deal. Here we gain perspective by seeing it at the very beginning. The Great White Sitka by Jeffrey R. Elliott (1993) Holy Moby Spruce! How does one hack a log that’s eleven feet wide into 4000 guitar tops? Very carefully! By the way, this is a log that Steve McMinn rescued from the pulp mill. Meet the Maker: Bernard Millant by Jonathon Peterson (2006) Millant is a violin maker, a bow maker, an appraiser, an author, and a man of high repute within the violin world. The depth of training behind many old-school fiddle people will astonish most guitar makers, and it makes for entrancing reading. Meet the Maker: Dmitry Zhevlakov by Federico Sheppard (2007) This is not only the story of a Russian luthier who also makes beautiful rosettes for other builders, but is another example of how the Internet has changed the world — in this case for better. Aluminum Sonatas: A Brief History of Aluminum Stringed Instruments in the Last 120 Years by James Condino (2007) Every luthier knows how fickle and finicky the market is, so it’s no wonder that musical instruments made of aluminum didn’t catch on. Examined here are a violin, a mandolin, and a pair of bass viols. Fun stuff! Mechanical Compliance for Soundboard Optimization by David Hurd (2007) Hurd believes that the fastest way to great instruments is science, and it’s hard to argue with such a rational man. His jigs measure the deflection of top plates while under tension, and once he carves the top and braces to the numbers he wants, he’s done. This could be math heavy, but he offers an Internet spread sheet to ease the pain. Construction of the Colombian Tiple by Anamaria Paredes Garcia and R.M. Mottola (2007) Cross a 12-string flattop with a classical guitar and you get the Colombian tiple. The tiple has four courses of three steel strings, but on the inside, it’s a classical. Follow Alberto Paredes as he builds the instrument in this photo tour. See GAL Plan #51. Meet the Maker: Mervyn Davis by Rodney Stedall (2007) Davis’ South African upbringing inspires a wonderful decorative sense in his instruments. He’s built a ton of different stuff but may end up best known for his wildly unique modular guitars called Smooth Talkers. Cricket: A Reclaimed Salvage Recovery by James Condino (2007) Condino’s mandolin is made from recycled materials, mostly Douglas fir and katalox. It is unique and beautiful, and the story behind it is pretty cool, too. Grading on the Curves: Fitting Bars and Bridges on Archtop Guitars by Steve Andersen (2007) This is a very detailed look at how a notable builder of archtop guitars fits tone bars and bridges to his instruments. The Venezuelan Cuatro by Aquiles Torres (2008) Traditionally, this instrument is a small 4-string guitar with 14 frets clear, no frets over the body, a flush fretboard, and a large veneer tap plate. Note that the cuatro built for the article has 17 frets clear of the body. See GAL Plan #58. The MacRostie Mandolin Deflection Jig by Don MacRostie (2008) MacRostie’s clever jig measures the top deflection of a carved mandolin under string load at any stage of its construction. It is a valuable tool within the reach of any luthier. The “Corker” Guitar: A Sideport Experiment by Alan Carruth (2008) Carruth built a classical guitar with many small ports drilled in the side. By plugging the ports in various combinations he investigated the usefulness and physics behind them. Though this guitar did not make a believer out of him, he admits that his results are somewhat inconclusive. Electric Guitar Setup by Erick Coleman and Elliot John-Conry (2009) Two disciples of Dan Erlewine explain the latest techniques of setting up the electric guitar. All the details and specs are there, as well as a bit of philosophy. Dulcimer 101 by John Calkin (2009) Dulcimers are needlessly maligned and in need of advocates, and the author is a strong one. Tools and jiggery are kept to a minimum to make construction of this entry level instrument as accessible as possible. The Guitar as a Structure and Some Practical Information on Bracing by James Blilie (2009) A structural engineer and guitar builder sees the guitar as a thing buffeted by forces and stresses. Total Flame Out: Retopping a Harp Guitar by Harry Fleishman (2009) Harry replaces the failed soundboard on a complicated instrument with as little refinishing and other stress as possible. Strings: The (Often) Forgotten Accessory by Fan Tao (2010) D'Addario's resident scientist Fan Tao helps us understand string issues in relation to custom instruments and customized tuning. Practical Acoustics by Michael Cone (2010) Cone describes his advanced apparatus and method for acoustically testing classical guitars. Meet the Maker: James Ham by Roger Alan Skipper (2010) Ham operates from a shop in Victoria, B.C. where he repairs and restores violin family instruments and constructs world class double basses. It’s All About the Core or How to Estimate Compensation by Sjaak Elmendorp (2010) Mathematics and parameters used to address the problem of string compensation estimation.
Posted on June 30, 2024September 17, 2024 by Dale Phillips It’s All About the Core or How To Estimate Compensation It’s All About the Core or How to Estimate Compensation by Sjaak Elmendorp Originally published in American Lutherie #104, 2010 Ever since I started playing guitar, I’ve wondered why the saddles in my steel string guitars were set at some magical angle and, more puzzling, why the B string in my Martin D-28 (well, a cheap Japanese replica I have had for forty years now and still outbooms any guitar you want to bring to the bonfire) was about 10% sharp. After having accepted that this was one more quirk of the guitar-building community I had since joined, I got intrigued again when I set out to build a long-scale nylon-string acoustic bass (Photo 1) and, for the life of me, didn’t know what compensation to use. The physics of the problem is very straightforward, but I found the mathematics employed to date rather inaccessible and the recipe for applying the developed theoretical frameworks not very clear. Given the fact that I once was a practicing physics PhD, I had to assume I wasn’t the only one wrestling with the question. Over the course of a long e-mail conversation with R.M. Mottola, for which I am very grateful, I was beginning to see some light at the end of the tunnel. 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 July 1, 2022March 5, 2024 by Dale Phillips Questions: Vaulted Back Guitar Questions: Vaulted Back Guitar by Sjaak Elmendorp Originally published in American Lutherie #97, 2009 AG from the Internet asks: Any tips on building a guitar with a vaulted back, such as the Baroque guitar in Plan #27? Little information is available on the precise shape of the back and effective ways of constructing it. Sjaak Elmendorp of Nieuw-Vennep, The Netherlands replies: After having made some steel string and classical guitars, I wanted to try something a little more involved. I bought a plan of a Baroque guitar with vaulted back, such as GAL Instrument Plan #27 drawn by Bruné. The plan provided only scarce information on the shape of the back, so as a novice to this field I was left to my own imagination. I must not be the only one, as there seemed to be a variety of schools of thought on the subject. Among professional builders there seems to be consensus that the guitars were constructed to have backs that have the same curvature across the width of the instrument, i.e., the cross sections resembled part of circles. From there on, it was a matter of combining the beautiful and ancient design with some modern mathematics. Using the location of the back braces along the centerline as position indicators, the width of the back and height of sides and center of the back was taken from the plan at these points. A simple calculation in an Excel spreadsheet allowed the radius of curvature of the back to be calculated from these three data points at each back brace position. The shape of the cross sections of the back were calculated and printed. (Note: the formula for this calculation can be found in John Sevy’s article in AL#58 p. 42 and BRBAL5 p. 355.) I am happy to make the spreadsheet available to interested readers. It is available on the Extras page of the GAL website: www.luth.org. (Look for “magazine extras” under the “publications” menu.) The cross sections were made out of plywood, to serve as a mold. The spruce braces were bent and attached with a few small short nails to the plywood. The ebony (10MM wide ) and maple (3MM wide) strips for the back were then cold bent into shape and glued on the braces using rubber bands and a few small clamps. The sides, also consisting of alternating ebony and maple strips with reinforcing spruce braces to provide cross-directional strength, were made on a mold. A heat gun was used to bend the strips into shape. It is now strung up and it looks, plays, and sounds correct. Although I see many areas for improvement, the back looks all right. Photo by Sjaak Elmendorp
