Re: Truss Rod Adjustment

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Posted by Ronnie on April 11, 2000 at 05:48:12:

In Reply to: Re: Truss Rod Adjustment posted by Steve DePra on April 05, 2000 at 15:38:11:

Check out this site from Fender, and it gives you into on truss rod adjustments.
e.g.: Truss-Rod
Check your tuning. Install a capo at the 1st fret, depress the 4th string at the last fret. With a feeler
gauge, check the gap between the bottom of the string and the top of the 8th fret -- see the
specification chart below for the proper gap. Caution: Because of the amount of string tension placed
on the neck (some basses also feature graphite reinforced necks, adding to the resistance present
while the bass is tuned to pitch), it is advisable to loosen the strings prior to making any actual
adjustment. After the adjustment is made retune the strings to pitch and recheck the gap with the
feeler gauge.
e.g.: How To Buy The Right Bass, By Jeff Berlin
Every bass with a wooden neck has a truss rod, a steel shaft inside the neck that helps to
stiffen it and prevent the tension of the strings from bowing it. (Graphite necks, being much
stronger inherently, do not have truss rods. I personally prefer wooden necks, because I can
tweak the action if I want to.) The truss rod is adjustable. A properly adjusted neck, you should
know, is not perfectly straight--although it can be awfully close, as mine are. The neck usually
has relief, a slight up-bow to prevent the strings from rattling against the frets (see Fig. 1). By
turning the truss-rod adjusting nut, you can alter the relief, and this has a profound effect on the
way a bass feels. This simple, fast adjustment lets you raise or lower the string height over the
fingerboard and the pickups. Buzzes may occur when you do this; this is normal and simply
requires additional adjusting of the rod. Buzzes may also occur if the frets are uneven, and one
or more may require filing. This isn't a serious problem, and any qualified repairman can level
the frets easily.

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