Adding a truss rod to a classical guitar - Neck or sound hole nut? - FRETS.NET2024-03-28T12:22:49Zhttp://fretsnet.ning.com/forum/topics/adding-a-truss-rod-to-a-classical-guitar-neck-or-sound-hole-nut?commentId=2177249%3AComment%3A282527&x=1&feed=yes&xn_auth=noHi John, if you use heat to s…tag:fretsnet.ning.com,2021-11-14:2177249:Comment:2825272021-11-14T22:42:21.765ZTaffy Evanshttp://fretsnet.ning.com/profile/TaffyEvans
<p>Hi John, if you use heat to straighten the neck, I would suggest inlaying a bar of hard material into the neck afterward. I have used steel, ebony, aluminum, and more recently carbon Fibre.</p>
<p>My early guitars were reinforced this way, a steel bar, it was all I could get 40 odd years ago. Those guitars have necks as good as the day I first strung them up. Actions to die for.</p>
<p>I find the heat assists in the straightening of the neck and the reinforcement helps keep it…</p>
<p>Hi John, if you use heat to straighten the neck, I would suggest inlaying a bar of hard material into the neck afterward. I have used steel, ebony, aluminum, and more recently carbon Fibre.</p>
<p>My early guitars were reinforced this way, a steel bar, it was all I could get 40 odd years ago. Those guitars have necks as good as the day I first strung them up. Actions to die for.</p>
<p>I find the heat assists in the straightening of the neck and the reinforcement helps keep it there.</p>
<p>Taff</p>
<p></p> If the neck needed - the wors…tag:fretsnet.ning.com,2021-11-05:2177249:Comment:2827152021-11-05T17:51:44.975ZRedactedhttp://fretsnet.ning.com/profile/Redacted
<p>If the neck needed - the worst possible thing you could do - heat treatment to straighten it, over time it will resort back to the condition that necessitated some manner of correction to begin with.</p>
<p></p>
<p>But that is just based on prior experience(s).</p>
<p>If the neck needed - the worst possible thing you could do - heat treatment to straighten it, over time it will resort back to the condition that necessitated some manner of correction to begin with.</p>
<p></p>
<p>But that is just based on prior experience(s).</p> Another possibility is heat s…tag:fretsnet.ning.com,2021-11-05:2177249:Comment:2827122021-11-05T17:37:51.264ZLARRY KLOSEhttp://fretsnet.ning.com/profile/LARRYKLOSE
<p>Another possibility is heat straightening the neck. I have an inexpensive Flamenco I bought in Spain. The neck bowed a bit and my local repair tech applied a neck heater and clamps to reverse the warpage. It worked well and hasn’t been a problem since. I’m told that a repeat may sometimes be necessary but not for this one. This shop sells many low priced guitars and does this frequently. <br/><br/></p>
<p>Larry</p>
<p>Another possibility is heat straightening the neck. I have an inexpensive Flamenco I bought in Spain. The neck bowed a bit and my local repair tech applied a neck heater and clamps to reverse the warpage. It worked well and hasn’t been a problem since. I’m told that a repeat may sometimes be necessary but not for this one. This shop sells many low priced guitars and does this frequently. <br/><br/></p>
<p>Larry</p> Slow response here, Mr. Wrig…tag:fretsnet.ning.com,2021-11-03:2177249:Comment:2824972021-11-03T20:51:11.832ZRedactedhttp://fretsnet.ning.com/profile/Redacted
<p>Slow response here, Mr. Wright nailed it though.</p>
<p></p>
<p>As I posted:</p>
<p><span>"Mass load the neck with a steel bar and mitigate, reduce or eliminate out of phase resonance(s). This will <em><strong>allow the vibrating string to drive the top more efficiently since string energy will be prevented from the neck vibrating uselessly</strong></em>."</span></p>
<p></p>
<p>The highlighted portion is the most important benefit, for me.</p>
<p>MOE is important as is MOI but mass can do…</p>
<p>Slow response here, Mr. Wright nailed it though.</p>
<p></p>
<p>As I posted:</p>
<p><span>"Mass load the neck with a steel bar and mitigate, reduce or eliminate out of phase resonance(s). This will <em><strong>allow the vibrating string to drive the top more efficiently since string energy will be prevented from the neck vibrating uselessly</strong></em>."</span></p>
<p></p>
<p>The highlighted portion is the most important benefit, for me.</p>
<p>MOE is important as is MOI but mass can do interesting things when taken into consideration.</p> my ignorant guess is "out of…tag:fretsnet.ning.com,2020-07-29:2177249:Comment:1924082020-07-29T03:25:00.003ZWalter W Wrighthttp://fretsnet.ning.com/profile/WalterWWright
<p>my ignorant guess is "out of phase resonance" = dead spot, where a note just goes away as soon as you hit it</p>
<p>seems like a bigger thing with basses, designers try to eliminate them or at least change something in neck stiffness or headstock weight to move them in between two frets so they're not such a problem</p>
<p>my ignorant guess is "out of phase resonance" = dead spot, where a note just goes away as soon as you hit it</p>
<p>seems like a bigger thing with basses, designers try to eliminate them or at least change something in neck stiffness or headstock weight to move them in between two frets so they're not such a problem</p> Hi R,
Fascinating stuff, I’m…tag:fretsnet.ning.com,2020-07-16:2177249:Comment:1922532020-07-16T00:28:01.774ZRussell Vancehttp://fretsnet.ning.com/profile/RussellVance
<p>Hi R,</p>
<p>Fascinating stuff, I’m not familiar with the process of eliminating out of phase resonance from a neck (and presumably leaving the in phase resonance intact). More information on how to do this would be much appreciated. Particularly how to determine if it’s occurring and how to measure it before and after. <br/>Regards, Rusty.</p>
<p>Hi R,</p>
<p>Fascinating stuff, I’m not familiar with the process of eliminating out of phase resonance from a neck (and presumably leaving the in phase resonance intact). More information on how to do this would be much appreciated. Particularly how to determine if it’s occurring and how to measure it before and after. <br/>Regards, Rusty.</p> I would not put a truss rod i…tag:fretsnet.ning.com,2020-07-15:2177249:Comment:1922462020-07-15T00:20:16.430ZRoger Häggströmhttp://fretsnet.ning.com/profile/RogerHaeggstroem
<p>I would not put a truss rod in a classical guitar. The better solution is to use a stiff carbon rod and sand a nice small relief in the fretboard after the neck is fixed in a jig as it is with strings at tension. The tension from the nylon strings is not that heavy, the rod will keep the shape of the neck and will not creep. No need to adjust.</p>
<p>I would not put a truss rod in a classical guitar. The better solution is to use a stiff carbon rod and sand a nice small relief in the fretboard after the neck is fixed in a jig as it is with strings at tension. The tension from the nylon strings is not that heavy, the rod will keep the shape of the neck and will not creep. No need to adjust.</p> An adjustable truss rod is a…tag:fretsnet.ning.com,2020-07-14:2177249:Comment:1921262020-07-14T12:21:23.158ZRedactedhttp://fretsnet.ning.com/profile/Redacted
<p>An adjustable truss rod is a waste of time. Mass load the neck with a steel bar and mitigate, reduce or eliminate out of phase resonance(s). This will allow the vibrating string to drive the top more efficiently since string energy will be prevented from the neck vibrating uselessly.</p>
<p>Try it over carbon fiber.</p>
<p>An adjustable truss rod is a waste of time. Mass load the neck with a steel bar and mitigate, reduce or eliminate out of phase resonance(s). This will allow the vibrating string to drive the top more efficiently since string energy will be prevented from the neck vibrating uselessly.</p>
<p>Try it over carbon fiber.</p> Before being able to answer y…tag:fretsnet.ning.com,2020-05-29:2177249:Comment:1915332020-05-29T01:28:34.924ZGreg Mirkenhttp://fretsnet.ning.com/profile/GregMirken
Before being able to answer your questions, I have to ask a few. Are you going to reuse or replace the fingerboard? What is it made of? It’s unusual to put an adjustable rod in a nylon-strung guitar- does this neck seem especially rubbery? Have you considered adding a stiffening bar (non-adjustable rod) of carbon fiber or steel?<br />
One of my important goals as a repairer/restorer is to preserve the original look of the instrument as much as possible. For that reason I would pretty much never put…
Before being able to answer your questions, I have to ask a few. Are you going to reuse or replace the fingerboard? What is it made of? It’s unusual to put an adjustable rod in a nylon-strung guitar- does this neck seem especially rubbery? Have you considered adding a stiffening bar (non-adjustable rod) of carbon fiber or steel?<br />
One of my important goals as a repairer/restorer is to preserve the original look of the instrument as much as possible. For that reason I would pretty much never put the rod adjustment at the headstock in this situation. Also, it’s hard to imagine moving the neck so much in a reset that the adjustment nut moves up more than a fraction of a mm. Once you get the neck straight you may find there’s no need for a reset anyway.<br />
<br />
Greg Mirken