The Bridge Maintains Intonation.

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Adjusting the truss rod or even changing strings on the guitar can change intonation. These alterations will possibly change the length of the strings, and even minute changes can diminish the instrument's intonation.

With Gibson's Tune-o-matic bridges, adjusting the length of the string is simple. Each string has its own saddle with an adjustment screw which moves the saddle forward and backward on the bridge.

As you adjust the saddle position, use the method described in "How To Buy An Electric Guitar" for checking intonation. When the string plays the same note open and fretted at the twelfth, intonation is in adjustment. To make intonation as accurate as possible, plug into a meter rather than trusting your own ear.