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Pietro Moretti bass repair

Pietro Moretti in for repair A local teacher in the area recommended me to one of his students who had an accident with their beautiful Moretti double bass. Somehow the upper bout of the bass got squeezed, and both of the upper ribs cracked. Ouch
Here is the largest of the two cracks. Here is the largest of the two cracks.
The other crack is so small that I have marked it in the picture so you can find it.  If these cracks were left alone, they would eventually grow could cause major problems.  The other crack is so small that I have marked it in the picture so you can find it. If these cracks were left alone, they would eventually grow and could cause major problems.
To fix this right, I am going to remove the top to gain access to the inside.  For this I use an opening knife and a lot of patience. To fix this right, I am going to remove the top to gain access to the inside. For this I use an opening knife and a lot of patience.
The top came off clean and relatively easy.  This is a good sign of quality construction. The top came off clean and relatively easy. This is a good sign of quality construction.
Once again I have marked the location of the crack in the picture to make it easier to find. Once again I have marked the location of the crack in the picture to make it easier to find.  The pencil marks are from the factory.
The second crack as seen from the inside. The second crack as seen from the inside.
To repair the cracks I made thin spruce veneers glued with hot hide glue and clamped with rare earth magnets. To repair the cracks I made thin spruce veneers glued with hot hide glue and clamped with rare earth magnets.
This is what the finished patches look like from the inside. This is what the finished patches look like from the inside.
And the other side And the other side.
While the patches were drying I did a little touch up on the damaged rib.  There was a considerable amount of buckle rash that I fixed while I was at it. While the patches were drying I did a little touch up on the damaged rib. There was a considerable amount of buckle rash that I fixed while I was at it.
With the work done on the inside, I can now glue the top back on. With the work done on the inside, I can now glue the top back on.
After a second round of touch up the bass is finished. After a second round of touch-up the bass is finished.

Once again, thanks to everyone who reads the post.  Please feel free to share it.

3 thoughts on “Pietro Moretti bass repair”

  • Jean

    Just fascinating -- as always :)

    Reply
  • Andy Preston

    Thanks for posting all those pictures! I JUST bought one of those basses new, and it was great to see pictures of the inside. You do good work. Do you think they are using properly aged wood?

    Reply
    • Andrew

      Andy, Congratulations those are nice basses. From what I can tell they do indeed use seasoned wood. That doesn't mean yo don't have to humidify. I highly recommend using two Oasis Bass humidifiers during the winter months to avoid dryness cracks. Check them out here, http://bayberrymusic.com/oasis-3-4-upright-bass-humidifier-oh21.html

      Reply
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