Posted on July 28, 2026July 28, 2026 by Dale Phillips Review: Logistimatics Micro 299 Mini GPS Tracker Review: Logistimatics Micro 299 Mini GPS Tracker by John Mello Originally published in American Lutherie #143, 2021 Logistimatics Micro 299 Mini GPS Tracker logistimatics.com/shipping In the midst of the pandemic I shipped one of my guitars Next Day Air to a client in Chicago from my shop in the San Francisco Bay Area, by a carrier that will remain unnamed. Not only did it not get there the next day, but they lost track of it, finally delivering it a stomach-churning week later. Not wanting to feel quite so helpless when I needed to ship a second guitar to the same client via the same outfit, I, with the help of my more tech-savvy son, located and purchased the Logistimatics Micro 299 Mini GPS Tracker. At a mere 2 1/2˝×1˝×5/8˝, it slipped easily into the storage compartment of a guitar case. Setup was quite easy, and once I downloaded the app and turned it on, it reported its location hourly on a phone, tablet, or computer. Mine ran for at least two weeks on a single charge, and it should last up to five weeks if you adjust the report frequency. 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. For details, visit the membership page. MEMBERS: login for access or contact us to setup your account.
Posted on July 21, 2026July 21, 2026 by Dale Phillips Uncle Dan’s Favorite New Vise Uncle Dan’s Favorite New Vise by Dan Erlewine Originally published in American Lutherie #142, 2021 Howdy, GAL. I miss you all! Some of you may already know about what I am showing here, but I’d be surprised if many did, as it’s so new on the market. It’s the greatest new tool in my shop, and in the shops of several professional luthier pals of mine: The Total Vise, a sturdy pedestal-stand and neck-holding vise that makes so many guitar repair, building, wiring, and setup jobs better, safer, and easier — especially for someone who doesn’t have a good-sized shop, benches, and permanent fixtures. Originally designed as a gun- and bow-making vise, the Total Vise’s maker, Jeff Howard, was surprised and pleased to find that a few luthiers stumbled upon his setup and liked it. Right away, Jeff asked us to help him design a version of it for guitar work, and we all chipped in over the last half year. Finally it’s ready for any professional, part-time, or novice luthier that wants the best setup for holding a guitar for serious business. The Total Vise has been a game-changer for us and we just want to tell the world about it. So here we’ll visit a few shops from around the country and see how the Total Vise is put to use. 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. For details, visit the membership page. MEMBERS: login for access or contact us to setup your account.
Posted on July 8, 2026July 8, 2026 by Dale Phillips Measuring Resonant Frequencies of an Acoustic Guitar Measuring Resonant Frequencies of an Acoustic Guitar by Mark French Originally published in American Lutherie #143, 2021 Many luthiers track resonant frequencies of their acoustic guitars, often with the goal of meeting some target values. It’s common for the first two resonant frequencies of a full-sized acoustic guitar to be near 100Hz and 200Hz respectively. Some builders use detailed frequency measurements during the build process. For example, Greg Byers described his methods in his 2017 GAL Convention workshop (AL#134). Another good discussion is in Volume 1 of Contemporary Acoustic Guitar Design and Build by Trevor Gore and Gerard Gilet. Resonant frequencies are a function of the ratio of stiffness over mass. Specifically, frequency is proportional to √(stiffness/mass). This simple relationship is harder to apply at higher modes, but it describes the effect of the structure on the lowest modes well enough for us. In practice, it’s easier to reduce resonant frequencies than to increase them. Selectively thinning parts of the top or shaving braces reduces stiffness more than mass, and so tends to reduce resonant frequencies. It’s very uncommon for luthiers to add anything, either mass or stiffness, to their guitars in order to modify dynamic response, though it is certainly a valid thing to do. Trevor Gore is the only one who comes to mind, though there may be others I’ve not heard of. 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. For details, visit the membership page. MEMBERS: login for access or contact us to setup your account.
Posted on January 15, 2026January 15, 2026 by Dale Phillips Getting Good Inlay Results with Inexpensive CNC Routers Getting Good Inlay Results with Inexpensive CNC Routers by Jon Sevy Originally published in American Lutherie #144, 2021 Prices for basic CNC routers have dropped dramatically, to the point where small machines in the “3018” class cost only about $250. The name comes from the workable cutting area of 30CM×18CM, which is too small for cutting many of the parts of a guitar (neck, body outline, and so on), but perfect for creating inlays for the peghead and fretboard. The router can be used to cut out both the inlays (in shell, wood, and other materials) and the pockets into which they will be glued. If you have done this by hand, you’ll know just how exacting and time consuming this work is. I use a jeweler’s saw and bird’s-mouth platform to cut the delicate inlays from mother-of-pearl and abalone, and a Dremel with a selection of fine bits to cut out the pockets, using a high-magnification headpiece so I can cut precisely to the lines. It’s tedious work, especially for the repetitive fretboard inlays, so I was interested to try a CNC router as a way to offload this task. There are many resources available for getting started with one of these routers, including tutorials and software packages for developing designs and controlling the router. The routers are widely available on Amazon; I purchased a SainSmart Genmitsu 3018 Pro model based on the reviews (Photo 1). Some assembly is required, but it was relatively straightforward to get it up and running. Most routers come with software that can be used to control the machine, but it’s often proprietary and may be somewhat limited in functionality. However, the machines generally use a standard open-source firmware called GRBL, which makes it easy to use other software packages to control the router. Though the software supplied with the Genmitsu router is adequate, it’s Windows-based software and I run Linux on my laptop, so I chose to use the open-source bCNC package instead of the Genmitsu software. But all of these software packages support the two essential operations for router control, which are manual positioning and execution of G-code to automatically drive the router. G-code is a simple text-based language to specify the position of the cutting bit. 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. For details, visit the membership page. MEMBERS: login for access or contact us to setup your account.
Posted on December 5, 2025June 8, 2026 by Dale Phillips Guitar Making as a Teaching Tool Guitar Making as a Teaching Tool by Debbie French and Mark French Originally published in American Lutherie #144, 2021 Guitar making can be many things. To some it is a craft; to some it is a livelihood. And it’s also being used as a compelling teaching tool around the country. We are part of a project called STEM Guitar that is funded by the National Science Foundation, which provides faculty professional development to high-school and community-college faculty and students around the country, so they can, in turn, use guitar making to teach technical subjects. In educational lingo, these are STEM subjects — Science, Technology, Engineering, and Math. We all know how important it is for students to learn at least the basics of STEM subjects. As luthiers, many of us routinely work with structural dynamics, acoustics, material properties, geometry, and computer-controlled machines. Modern guitar factories wouldn’t work without heavy investments of technology or without trained people. In 2009, industrial arts courses represented just 0.02% of credits taken nationally by high school students (U.S. Department of Education, 2009). However, when an updated report was released in 2013, industrial arts courses were not even included in the NCES reporting; such courses were replaced by engineering and design and manufacturing and technology courses were listed, which represent 0.7% and 0.6% of credits earned by high school students, respectively (U.S. Department of Education, 2013). The guitar program offers an engaging way of exposing students to industrial arts skills through STEM curriculum. 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. For details, visit the membership page. MEMBERS: login for access or contact us to setup your account.
