How to do-it-yourself instructional on making a truss-rod nut adjustment on a one year old Gibson Songwriter acoustic guitar (similar to a Gibson J-50) to eliminate fret-buzz.
[Guitar buzzes]
Now thatís whatís known as fret buzz. If your guitar sounds like that Ė donít worry, itís not time to get a new guitar. Itís just time to do a simple adjustment.
[Music]
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Guitar string removal  Truss rod tensioning technique

OK so youíve got this lock-nut on this truss rod underneath the cover there and weíre just going to fit it with this five sixteenths deep socket and weíre going to just give it a little bit of a turn.
So itís a new guitar and so I assume that the wood is swelling and itís become too tense against the truss rod so I back off the tension.
The standard change of tension is a quarter turn at a time, meaning ninety degrees at a time.

                                              

 

OK weíre just going to slip on the deep five sixteenths socket, just like that you see. Weíre going to back the truss rod nut off, just a quarter turn to begin with, of course, thatís what everybody does.
OK so I like to slack it off a hundred and twenty degrees and then turn it up another thirty degrees to make it a ninety degree turn in total.
Now having just done that adjustment, Iím just going to set it down and let the wood ďtakeĒ and reshape a little bit before I go restringing it.
You can see for yourself what the fretboard looks like after the adjustment.
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Fretboard curvature for lighter action  Playing gibson songwriter in first position

For a ninety degree total reduction in tension but as with tuning a guitar string you like to come up to the tension on it rather than just go down to it. So, if youíre a guitar player Iím sure you understand what Iím talking about: you donít tune down, you only tune up. So thatís what I did with the nut was I backed off further than I had to and then came up to the tension that was required.
[Strums]
Sounds OK now.


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