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Greetings all
I'm having a similar problem on two of my acoustics (AC312, and 508M). Both have developed a ringing harmonic on the high E string, both open and while fretted. I have brought it to a good local luthier and we have been through new saddles, recut nuts, tightening tuners, adjusting saddle to peg angle, changing strings (soldering string windings just in case), Bracing all appears solid, electronics have been remounted in case it was loose wires, proper setup done for action and neck (no action related fret buzz, just the damn harmonic), even clamping down the frets in case one was loose.
The only thing we can find that is left to vibrate is the truss rods, both of which are already under tension. The only thing we were thinking was possibly the two bars of the double truss rods are vibrating against each other somehow???
Odd that it should happen to both guitars. I haven't heard anything back from an email to Eastman so I thought I would throw it out here. Has anyone heard of this as a common problem, and possibly have a solution.
BTW - this was not meant as any kind of a dig on Eastman, I still love them and I'm thinking of adding another dreadnaught to the collection ASAP. Just stumped about the babies.
-Peter
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