Author Topic: Loose truss rod  (Read 18035 times)

Prog13

  • I'm New Here
  • *
  • Posts: 9
  • Alembic and Mesa/Boogie rules!
Loose truss rod
« on: October 25, 2025, 01:43:51 AM »
Hi

I have an Essence 4 string and i use hi beams 40-95.

Due to humidity the neck went back bow and i had fret buzz from the 1st up to 9th fret on the E string.I tried to adjust the truss rod but it is full loose so i cannot give relief to the neck.

1)I placed the bass on my sofa with the headstock at the edge of the sofa letting the weight of the bass to give relief to the neck and it worked.
2)Same way is to loosen the strings,put a wooden dowel on the fretboard and tighten the strings again for 1-2 days.
3)I also know about using heavier gauge string will help.

Of course i know that these are not recommended ways to solve the problem but just some temporarily solutions.

After a research online i read that for double truss rods,if you keep rolling the truss rod nut/screw anti clockwise,then the truss rod will tighten again.I am afraid that if i do so then the nut will fall off.
I do not know if this information is valid for Alembics or if you have any other suggestions.

Thanks in advance

Greetings from Athens,Greece

adriaan

  • Global Moderator
  • Senior Member
  • ******
  • Posts: 4341
Re: Loose truss rod
« Reply #1 on: October 25, 2025, 03:01:11 AM »
Hi!

Quote
After a research online i read that for double truss rods,if you keep rolling the truss rod nut/screw anti clockwise,then the truss rod will tighten again.I am afraid that if i do so then the nut will fall off.
I think this applies to dual-action trussrods. Alembics have single-action double truss rods, so the end of the adjustability is where you should stop adjusting.

Instead of a wooden dowel, you could put a book under the strings, and tune to normal pitch. Over a few days, the neck should start to develop extra back-bow, giving you more range in the trussrods once you remove the book. If at first it doesn't have the desired effect, you can tune the strings a bit higher. Easy does it ...

Prog13

  • I'm New Here
  • *
  • Posts: 9
  • Alembic and Mesa/Boogie rules!
Re: Loose truss rod
« Reply #2 on: October 25, 2025, 03:51:11 AM »
Thank you Adriaan
I did not know that Alembics use single action truss rods.

I just did put a book from 5th to 8th fret and tuned to standard pitch.
Lets see what happens in a couple of days
« Last Edit: October 25, 2025, 03:54:46 AM by Prog13 »

keith_h

  • club
  • Senior Member
  • *
  • Posts: 3499
Re: Loose truss rod
« Reply #3 on: October 26, 2025, 06:16:25 AM »
If worst comes to worst a competent luthier should be able to perform a heat bend to add some relief to the neck and allow the truss rods to perform their function.

David Houck

  • Global Moderator
  • Senior Member
  • ******
  • Posts: 15696
Re: Loose truss rod
« Reply #4 on: October 26, 2025, 09:15:45 AM »
Just checking that both truss rod nuts were loose?

Prog13

  • I'm New Here
  • *
  • Posts: 9
  • Alembic and Mesa/Boogie rules!
Re: Loose truss rod
« Reply #5 on: October 26, 2025, 10:48:51 AM »
Yes,both are loose

Prog13

  • I'm New Here
  • *
  • Posts: 9
  • Alembic and Mesa/Boogie rules!
Re: Loose truss rod
« Reply #6 on: October 26, 2025, 10:52:16 AM »
If worst comes to worst a competent luthier should be able to perform a heat bend to add some relief to the neck and allow the truss rods to perform their function.

Yes,i know that this will be the next step if all else fails
We will see what happens and i will inform you accordingly

Prog13

  • I'm New Here
  • *
  • Posts: 9
  • Alembic and Mesa/Boogie rules!
Re: Loose truss rod
« Reply #7 on: November 13, 2025, 04:39:18 AM »
Hi guys

I placed a book underneath the strings and...The Great Gatsby got the job done!
Every 2 days i would check about fret buzz and neck straightness with a notched straightedge tool.
If there was no fret buzz and the neck was flat,then i would tighten the truss rod 1/4 of an inch.
So after all these days i managed to give the truss rod some room for future adjustments.

I want to thank Adriaan for his precious advice and the all guys who were interested in solving this case.
Alembic community is very strong and has a solution for every problem.
Cheers!
« Last Edit: November 13, 2025, 04:55:36 AM by Prog13 »

David Houck

  • Global Moderator
  • Senior Member
  • ******
  • Posts: 15696
Re: Loose truss rod
« Reply #8 on: November 13, 2025, 06:45:25 AM »
Good to hear that you got it worked out!

adriaan

  • Global Moderator
  • Senior Member
  • ******
  • Posts: 4341
Re: Loose truss rod
« Reply #9 on: November 14, 2025, 01:34:51 PM »
Hi guys

I placed a book underneath the strings and...The Great Gatsby got the job done!
Every 2 days i would check about fret buzz and neck straightness with a notched straightedge tool.
If there was no fret buzz and the neck was flat,then i would tighten the truss rod 1/4 of an inch.
So after all these days i managed to give the truss rod some room for future adjustments.

I want to thank Adriaan for his precious advice and the all guys who were interested in solving this case.
Alembic community is very strong and has a solution for every problem.
Cheers!
Credit goes to Pierre-Yves!

Prog13

  • I'm New Here
  • *
  • Posts: 9
  • Alembic and Mesa/Boogie rules!
Re: Loose truss rod
« Reply #10 on: November 15, 2025, 04:09:05 AM »
Pierre-Yves?

https://www.pierreyveslejeune.net/

Is this bass player that you talk about?

adriaan

  • Global Moderator
  • Senior Member
  • ******
  • Posts: 4341
Re: Loose truss rod
« Reply #11 on: November 15, 2025, 07:30:22 AM »
Pierre-Yves?

https://www.pierreyveslejeune.net/

Is this bass player that you talk about?
I was thinking about our own pierreyves, and his post here.

Thanks for bringing up the other Pierre-Yves, though. Worth a listen!