Posted on April 21, 2023May 18, 2023 by Dale Phillips Battery-Powered Instrument Amplifiers Battery-Powered Instrument Amplifiers by Joseph Ennis Originally published in American Lutherie #69, 2002 and Big Red Book of American Lutherie Volume Six, 2013 After reading Francis Kosheleff’s description of building speaker enclosures which resemble instrument bodies, I thought I would offer my experience of what has worked for me. I have added battery-powered amplifiers and speakers inside instrument bodies to either augment the sound of a weak instrument like a harp or mandolin, or just to act as stage monitors. The thing left unspoken in Mr. Kosheleff’s article is that not just any speaker will work well. The speaker should be chosen to match the instrument body resonance. The first air resonance of a hollow body instrument is essentially the same as the Helmholtz resonance of a tuned speaker cabinet. The same math applies. The formula is given below. 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 April 21, 2023April 24, 2023 by Dale Phillips The Two-Storey Dulcimer The Two-Storey Dulcimer by Roger Alan Skipper Originally published in American Lutherie #101, 2010 I read John Calkin’s “Dulcimer 101” in AL#98 with interest, but with little expectation of practical application. I’ve never built a dulcimer; I’ve never wished to build one (sung to the “Purple Cow” jingle). Within a month, though, my best customer and great friend Dr. Gerry Snelson asked me to do exactly that. Perhaps anticipating my reluctance to regress to such a basic instrument, Gerry came armed with photos of high-end dulcimers, video clips of accomplished players, and with his normal bundle of challenging demands and fresh ideas. 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 April 21, 2023April 24, 2023 by Dale Phillips Calculating Soundbox Volume Calculating Soundbox Volume by Dave Raley Originally published in American Lutherie #70, 2002 and Big Red Book of American Lutherie Volume Six, 2013 Want to design a new guitar shape and maintain an equal volume of enclosed air by adjusting the height of the sides? Here’s how to calculate volumes. Accuracy is a function of how long you want to spend measuring and calculating. Consider two bodies: Figs. 1a and 2a. The body in Fig. 1 is 18" on the X axis and 4" on the Z axis. Suppose that you wish to make the body in Fig. 2 have the same volume as the body in Fig. 1 while maintaining the same X axis. Fig. 3 defines the axes regardless of the way the figures are turned. 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 April 21, 2023April 24, 2023 by Dale Phillips Product Reviews: Ameritage Cases Product Reviews: Ameritage Cases by R.M. Mottola Originally published in American Lutherie #68, 2001 and Big Red Book of American Lutherie Volume Six, 2013 Ameritage Cases My friend and mentor Jim Mouradian of Mouradian Guitars is a clever guy. He builds a thoroughly modern electric bass called the Reality. It has a trim upper horn and swoopy waist cut that you would never confuse for a ’50s-styled Fender Jazz bass. But if you were to take just the outline of the Fender and lay it over the outline of Jim’s bass, you’d notice an interesting thing. The outline of the Reality is identical to that of the Jazz in a few places, and in the places where it is different, it is always smaller. Thus Jim’s instrument fits perfectly snug inside an off-the-shelf aftermarket Jazz bass case. This detail gives Jim a lot of options when it comes to cases. Like I said, he’s a clever guy. Those of us who build instruments for which “standard” cases are not available have to have cases custom made. Some builders need custom cases simply because they don’t want their instruments seen in anything less. There are a number of custom case makers. I’d like to share my experiences with one of them. Ameritage Carrying Cases is the musical instrument division of GWW Inc., a manufacturer that makes cases for just about anything. I found them via their website and asked for quotes for four cases for acoustic-electric basses I was building. I knew that custom cases would be needed for these, and I knew they would fit into standard Jazz bass cases but would rattle around inside. This last bit of information turns out to be kind of important. You can look at an instrument case as having two major components — the outer hard shell, and the padding between the shell and the instrument. If a manufacturer has to custom build the shell, then you are looking at one expensive case. But if they can use one of their existing shells, then the only thing that is unique for your case is the padding, and that makes for a more reasonable price. My instruments would fit into the standard rectangular electric-bass case shell. 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 April 21, 2023April 24, 2023 by Dale Phillips Travel Lute Travel Lute by Ben Cohen Originally published in American Lutherie #101, 2010 I am an amateur luthier and a lutenist. I recently attended a reunion of sorts with a number of singers from my old early music ensemble at Oberlin College, and I regretted not having a lute handy to be able to accompany some friends on lute songs. I travel with a mandolin because it fits in the airplane overhead bin and allows me to play Bach suites and choros while my flight is delayed. Lutes aren’t good for air travel. The funny shape makes them hard to fit in the overhead bin. While there are some small 6-course instruments that might squeeze into an overhead bin, most lutenists would prefer to travel with an 8-course instrument to cover as much repertoire as possible. Lutes are also delicate and expensive. Flying with a lute usually requires some kind of super-protective flight case, awkward and expensive. Guitars do not make decent lute substitutes. The guitar has only six strings, and they are not spaced at all like a lute. The world needs a good travel lute. A banjo approach struck me as the way to go, since the lute has such a thin top that it sounds more like a banjo than any other wooden plucked string instrument. I used a Remo 12" pretuned hand drum that I had on hand. 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.
