Luke II neck problem

[Okgb]

I have an older Luke II, non compensated nut era that has a dip in the neck from about the 9th to 20th fret and the truss rod seems unable to straighten this area [ checked with slotted straight edge ]. The truss rod does have some range affecting the neck from the 1st to 9th , but not after that so can't get a decent action because the frets after the 20th cause some buzzing.
Any good ideas on what is going on ? is it a truss rod problem, anyone ever encounter this? TIA

 

[elvis2]

Fret level should solve it. The neck doesn't have to be perfectly straight as long as the frets are.

 

[elvis2]

I should add that the neck needs to be STABLE.

 

[Okgb]

Right, the easier alternative. Some frets will be higher than others as opposed to planning the fingerboard. still why the truss rod isn't fully working?

 

[elvis2]

How much dip does the neck have vs. how much player there is on the frets? My sense is that the truss rod may not be designed to make the neck perfectly straight, rather the truss rod may be designed to get the frets in alignment, and you may have worn frets that are the actual cause of buzzing.

I am a bit out of my depth here. A call to Customer Support would probably be more helpful.

 

[DrKev]

You may have a combination of too much neck relief and not enough saddle height.

The truss rod does not affect the highest frets (it cannot because that part of the neck is thicker and bolted to the body). If you have buzzing on the highest frets, raise the action at the saddles. You may find then that the action over the 12th fret is a little higher, you can counter that by tightening the truss rod (because neck relief adds a little to the action we measure). But also know that as long as buzzing is not intrusive when playing through an amp/modeler then it's not a real problem. Don't chase perfection that does not exist.

 

[Craiguitar]

Luke 1's have the Gotoh Floyd Rose metal locking nut, so with you mentioning the nut type, it sound's like yours is a Luke 2 right? If the truss rod alone isn't quite doing it, then one thing to try is make sure the truss rod is nice and tight, then remove or slacken all the strings, and leave it for a couple of days. the headstock end of the neck should then straighten out naturally without the tension of the strings pulling it forwards again. That worked for me in the past with my Luke 1 which has a very slim neck. Much slimmer than any of my Luke 2's.

 

[Okgb]

Raising the saddles just makes the action bad, the buzzing in the dip area is bad enough to affect tone & sustain, not chasing perfection, It's a problem
so, could do a fret level without the neck straight but trying to understand the cause.

You're right Luke II pre compensated nut [ and different EMG's It seems ] Thanks all! so far

And to be clear, I was trying to get the neck straight for leveling not playing where I like a little relief