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  #1  
Old 03-09-2011, 09:12 AM
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Puzzled over fretless setup

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Hi, guys!

I hadn't played my fretless J-bass in a long while because the truss-rod was stuck. Well, I managed to fix the truss rod, which was great, so now I've been setting up the bass.

What puzzles me is this: if I set the neck to close to being totally straight, I get great mwah on most of the fretboard, BUT the 5 or so highest 'frets' (i.e.: towards the bridge-end of the fretboard) sort of clank against the fretboard and die out (most pronounced on the A-string).

If I set the neck for more relief, this clanking goes away, but the mwah is also a bit less pronounced.

Can anyone help me diagnose this problem?
  #2  
Old 03-09-2011, 09:18 AM
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do you have an adjustable bridge? is the nut stock, or did you tweak it?
  #3  
Old 03-09-2011, 09:27 AM
JLS JLS is offline
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Quote:
Originally Posted by JayfromDeeKay View Post
Hi, guys!

I hadn't played my fretless J-bass in a long while because the truss-rod was stuck. Well, I managed to fix the truss rod, which was great, so now I've been setting up the bass.

What puzzles me is this: if I set the neck to close to being totally straight, I get great mwah on most of the fretboard, BUT the 5 or so highest 'frets' (i.e.: towards the bridge-end of the fretboard) sort of clank against the fretboard and die out (most pronounced on the A-string).

If I set the neck for more relief, this clanking goes away, but the mwah is also a bit less pronounced.

Can anyone help me diagnose this problem?
Sounds like you need some fallaway in the fingerboard. You basically have the fretless version of a ski jump.
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  #4  
Old 03-09-2011, 12:12 PM
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m.oreilly: yep, the bridge is adjustable. I haven't touched the nut.

JLS: What would be the solution to that? Taking it to a pro and having the ski jump sanded down?
  #5  
Old 03-09-2011, 12:23 PM
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JTE JTE is offline
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The nut doesn't have any bearing on this, but most nuts aren't cut very well to begin with.

I assume you set the truss rod for an almost straight neck, then adjusted the saddles to the action you wanted, and still have the notes chocking out? That does sound like the fingerboard is rising at the tail (not uncommon with bolt-on necks). Sounds like a trip to a good repair tech.

John
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  #6  
Old 03-09-2011, 12:44 PM
JLS JLS is offline
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Quote:
Originally Posted by JayfromDeeKay View Post
m.oreilly: yep, the bridge is adjustable. I haven't touched the nut.

JLS: What would be the solution to that? Taking it to a pro and having the ski jump sanded down?
Yep.
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  #7  
Old 03-10-2011, 11:00 AM
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Thanks a lot, I'm gonna save up and take 'er to a tech.
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