Neck shifted with humidity, fret buzz below 12th

Discussion in 'Hardware, Setup & Repair [BG]' started by Yonni, Jun 14, 2020.

  1. Yonni

    Yonni

    Oct 31, 2016
    Scotland
    I got a new bass about 12 days ago. At the time we’d had the driest and hottest month of May for decades. The grass was dying and the air was very dry. My bass had a nice low action. Then the rain came and the last few days it’s been foggy. So a lot of moisture has been hanging around fir at least a week. I guess the neck has shifted because I suddenly started to notice bad fret buzz, especially on the D string. Today it’s been across A to G From around the 4th fret down. I loosened the truss rod about 3/4 of a turn, a little at a time. The buzz has improved and is now only below 12th fret and not as bad. But the action has gone up as a result. Is there any benefit in continuing to loosen the neck when the buzz now begins where the neck joins the body? Should I take this to a luthier rather than risk messing things up? I’ve adjusted minor neck issues in the past but I’m not very experienced in this. Does the neck need a shim? Is it possible that this bass has a very unstable neck and will need a lot of care and attention as the seasons change?
     
  2. idi0tf0wl

    idi0tf0wl

    May 30, 2020
    People are way too quick to recommend truss rod adjustments here. Unless your neck is warped, your first move to compensate for seasonal shifts should be to adjust your bridge saddles. Adjust the truss rod when you need to support an overall new neck shape, most likely years down the road — that's what they're there for.
     
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  3. Killed_by_Death

    Killed_by_Death Snaggletooth Inactive

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  4. Vinny_G

    Vinny_G

    Dec 1, 2011
    Neustria
    Remember, however, that the values indicated by Fender for relief and action are on the medium to low side. Depending on how you play you may need more than that.
     
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  5. Yonni

    Yonni

    Oct 31, 2016
    Scotland
    I watched and followed the movies in the stickie in this forum. I have feeler gauges and used them to make sure I wasn’t way off. My questions are really to check that the humidity is the cause as the original setup up was fine. And whether continuing to adjust will make much difference beyond the 12th fret. Tomorrow I’ll look at raising saddles as it makes sense that the closer the buzz is to the bridge, the more raising the saddles will help. Like I say, this is all a learning curve to me so all comments/advice welcome. Thanks.
     
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  6. idi0tf0wl

    idi0tf0wl

    May 30, 2020
    Necks change a bit with humidity — it's totally normal, and shouldn't necessarily send you rushing to your truss tools.

    You have to keep in mind that a lot of the, "Got a new bass, she plays beautifully after a full setup," stuff is coming from people buying used or vintage instruments, and who often have a predilection for tinkering.

    I understand your anxiety, but you went from fret buzz at the octave to, "Does my neck need to be shimmed?" *way* too fast. Don't worry so much, man.
     
    Last edited: Jun 14, 2020
  7. Turnaround

    Turnaround Commercial User

    May 6, 2004
    Toronto Canada
    Independent Instrument Technician - Retired
    No the first thing to adjust when the humidity changes is the relief. The saddles won't have moved but the relief will have. Adjust where the problem is not where it isn't.
     
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  8. Yonni

    Yonni

    Oct 31, 2016
    Scotland
    We’re not talking a little bit of buzz, we’re talking every single fret from about 5th down was really twanging. It was a big change from the first few days of planning. The only difference was the weather.
     
  9. idi0tf0wl

    idi0tf0wl

    May 30, 2020
    Same exact thing just happened to my bass. Practically overnight, even. The neck went back to a more neutral position. Unless your neck is bowed backward, if your action was low to begin with like mine and it was all good gravy before the rains hit, a little clockwise turn on the saddles is what you're after.
     
  10. J.D.B.

    J.D.B.

    Mar 11, 2007
    Michigan
    No the first thing to adjust when the humidity changes is the relief. The saddles won't have moved but the relief will have. Adjust where the problem is not where it isn't.

    This---------------^^^^^
    Water "in" works out to about a 1/3 loosen in SE Michigan on my Jazz necks. My P necks barely change. Water "out" is the reverse, usually late January of mid-February, again on the Jazz necks.
     
    Last edited: Jun 14, 2020
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  11. Killed_by_Death

    Killed_by_Death Snaggletooth Inactive

    Why would a change in humidity change the position of the saddles?
    The change causes the neck relief to vary!

    Everyone is so fast to go after the truss-rod, because that is exactly how you adjust the neck-relief.
     
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  12. Turnaround

    Turnaround Commercial User

    May 6, 2004
    Toronto Canada
    Independent Instrument Technician - Retired
    Not the saddles - the truss rod. Raising the saddles in this situation is like raising your car's suspension because you have a tire that's going flat.
     
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  13. idi0tf0wl

    idi0tf0wl

    May 30, 2020
    No, it's like letting air out of or putting air into your tires when the weather changes. Do you realign your drive train four times a year?
     
  14. Turnaround

    Turnaround Commercial User

    May 6, 2004
    Toronto Canada
    Independent Instrument Technician - Retired
    Do you adjust your belt when your shoes are loose?

    And for the record, I adjust my truss rod when it needs it. Certainly more than 4 times a year.
     
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  15. idi0tf0wl

    idi0tf0wl

    May 30, 2020
    I adjust my laces when my shoes are loose, not have them resoled. I adjust my belt when I put on or shed a bit of seasonal weight, not have my pants hemmed.

    Having shoes resoled and pants taken in or let out definitely have their place, but that's not the *first* thing you do when your clothes stop fitting the way they did a few months ago.
     
  16. Turnaround

    Turnaround Commercial User

    May 6, 2004
    Toronto Canada
    Independent Instrument Technician - Retired
    Your shoes have become loose. Tighten the laces - that’s what they are for. The neck has reacted to a change in humidity. Adjust the truss rod - that’s what it’s for.
     
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  17. Killed_by_Death

    Killed_by_Death Snaggletooth Inactive

    This thread is a mirror-image of hundreds of FB "advice" threads I've seen go this way when someone asks about their fret-buzz.
    Usually it's loads of people commenting to adjust the truss-rod w/o explaining or even mentioning measuring the neck-relief first.

    Sometimes you get those who are adamant that it can be fixed at the saddles & all seem to be relentless about their "advice" being correct.

    Geometry must have been skipped by some :smug:
     
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  18. idi0tf0wl

    idi0tf0wl

    May 30, 2020
    Well, no offense, but I'll choose to listen to the people I have in real life who have been working with guitars professionally longer than I've been alive, one of whom in particular was the lead touring tech for one band we've probably all heard here in his salad days, all of whom I'm merely repeating.

    I'm a performer first and foremost, so I yield to their expertise. And they have cost themselves a lot of my money by telling me why they were not going to do what I'd brought my instruments in for them to do, or telling me why they were going to do something I didn't ask for. When they tell me what truss rods are for, I listen.
     
  19. idi0tf0wl

    idi0tf0wl

    May 30, 2020
    My man.
     
  20. Killed_by_Death

    Killed_by_Death Snaggletooth Inactive

    You either wildly misunderstood, or they did you a huge disservice by giving you incorrect information.
    Please stop spreading this misinformation.