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11-24-2008, 06:41 AM
| | AES Fine Instruments | | Join Date: Feb 2002 Location: Brewster, NY, USA | | Quote:
Originally Posted by Jake deVilliers  Matthew knows what he's doing - that chunk will glue back in there just fine. | Of course one would rather not pull large chunks out of the soft top plate. You never feel good damaging your own (or somebody else's) craftsmanship. I find it helpful to work from the inside to the outside around the blocks, and also to use a solvent to loosen up the glue bond. I routinely spend an hour or more getting the top loose at the end blocks, and there can still be damage. I say these things not to be a told-you-so, but to try and help others with this gut-wrenching task. 
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11-24-2008, 08:10 AM
| | Registered User | | Join Date: Aug 2001 Location: new york area | | | i have a question. is it better to remove the chuck and glue it to the top or leave it as it is untill you glue the top back. |
11-24-2008, 10:11 AM
|  | 'Woodworker - Witch Doctor - Luthier'
Owner/The Bass Spa, String Repairman/L & M Vancouver | | Join Date: May 2006 Location: Crescent Beach, BC | | I watched that Morel video with chagrin. He's removing the perfectly quartered top of a valuable cello which will most certainly have had weak hide glue used to fasten it, whereas I get to take the top off a CCB with questionable wood or an old Kay that's had loose seams fixed with Gorilla Glue! Ah well... 
Last edited by Jake deVilliers : 11-24-2008 at 12:13 PM.
Reason: error
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11-24-2008, 10:19 AM
|  | quid verum atque decens
Builder: Rickett Customs | | Join Date: Jul 2007 Location: Southern Maryland | | | Oh man... Matthew,
I was grinding my teeth watching that. |
11-24-2008, 10:24 AM
|  | Student of Life Forum Administrator | | Join Date: Oct 2000 Location: Louisville, KY | | Subscribed so that hopefully I can get the caveman version of what's up with the tea leaves. |
11-24-2008, 10:28 AM
|  | Official Forum Flunkee | | Join Date: Mar 2004 Location: San Francisco, CA | | No wonder it's expensive to get the top taken off. It's just cuz it's agonizing for the luthier!  |
11-24-2008, 11:33 AM
| | Registered User
Private Inventor - Bass Capos | | Join Date: Aug 2005 Location: Cologne/Göttingen, Germany | | Quote:
Originally Posted by bassist14 | Who's gonna explain this one? I'm totally baffled. |
11-24-2008, 11:37 AM
| | Registered User | | Join Date: Jun 2005 Location: Houston, TX | | | I think what he is doing is cleaning up the crack so he can glue in a small strip of wood to close the gap. I'm not a luthier so I can't say for sure, but that makes the most sense to me. |
11-24-2008, 12:16 PM
| | 'Woodworker - Witch Doctor - Luthier'
Owner/The Bass Spa, String Repairman/L & M Vancouver | | Join Date: May 2006 Location: Crescent Beach, BC | | Quote:
Originally Posted by robobass Who's gonna explain this one? I'm totally baffled. | Matthew's opening up a separated crack so as to be able to put a splint in the slot. Its not really feasible to make a 20 thou filler strip - its easier to widen the crack to a point where a thin slice of wood can be fitted.
Its still not easy....... |
11-24-2008, 02:00 PM
|  | Supporting Member
Luthier: Bresque Basses, rep: Paulin EUB | | Join Date: Aug 2002 Location: Sydney, Australia | | Quote:
Originally Posted by Jake deVilliers Matthew's opening up a separated crack so as to be able to put a splint in the slot. | hey, that's not ME!!
But it could be ...  |
11-24-2008, 04:00 PM
| | 'Woodworker - Witch Doctor - Luthier'
Owner/The Bass Spa, String Repairman/L & M Vancouver | | Join Date: May 2006 Location: Crescent Beach, BC | | Quote:
Originally Posted by Matthew Tucker hey, that's not ME!! | Sorry Matthew, the video style was so similar I made an unwarranted assumption.
And yup, it could any one of a number of us bass witch doctors! |
11-24-2008, 04:03 PM
| | Registered User | | Join Date: Aug 2007 Location: emmitsburg, maryland | | cameo? had you pegged as a lefty  |
11-24-2008, 07:22 PM
| | Registered User | | Join Date: Dec 2007 Location: Winnipeg | | | Chladni patterns
So what does the Chladni patterns tell you, Matthew?
Would the node still reach the lower block, once the piece that stayed on the block has become part of the top plate again?
I wonder - would you be able to obtain these Chladni patterns, while the bass is still in one piece? Or are they specific for just the plate by itself?
And finally, why could you not drop a matrix-dremel-ultrasonic-graduating tool into the bass while it is still glued together, and get your graduating done that way?
Keep us no longer in suspense - it is killing me! |
11-24-2008, 07:45 PM
| | Supporting Member
Luthier: Bresque Basses, rep: Paulin EUB | | Join Date: Aug 2002 Location: Sydney, Australia | | | Well actually, like Ken, I'm keeping my interpretation of the Chladni patterns to myself for a while. Soz!
They are just one more way of measuring the properties of the top. They mean little by themselves. |
11-25-2008, 02:49 AM
| | Registered User | | Join Date: Apr 2004 Location: Traverse City, Michigan | | | An explanation is that this is the lowest vibration pattern that shows how stiff the plate is along the grain. If you look at the photo, you can see the frequency written down next to the plate.
It takes some talent to be able to make the tea leaves dance so things become that clear with a bass top.
__________________
Ken McKay - Michigan - USA
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11-25-2008, 05:19 PM
|  | Registered User
Maker of HPF-Pre upright bass preamp | | Join Date: Mar 2004 Location: Madison WI | | | The first time I saw Chladni patterns, the edge of the plate was excited with a violin bow. You know what that means...
French or German? Black hair or white? Soft or hard rosin? Pernambuco or carbon? Etc. Etc. |
11-29-2008, 06:58 PM
| | Registered User | | Join Date: Nov 2007 Location: NorCal | | I asked about removing a top because odds are I will need to do that myself one day and would like to know how.
I play ply basses so I suppose it might not be quite as nerve-wracking. 
I am not in the right tax-bracket to be able to pay a luthier to do most of my repairs, so I am studying bass luthier techniques out of necessity and personal fascination.
I will tackle most repairs and upgrades myself, except for fingerboard planing which I leave to the pros. |
12-02-2008, 07:48 PM
| | Registered User | | Join Date: Nov 2008 Location: North Carolina | | Quote:
Originally Posted by Gearhead43 I am not in the right tax-bracket to be able to pay a luthier to do most of my repairs, so I am studying bass luthier techniques out of necessity and personal fascination.
I will tackle most repairs and upgrades myself, except for fingerboard planing which I leave to the pros. | I'm right there with you. Got two projects going. One well, the other less so, but both are a chance to learn. Thankfully folks are kind enough to offer advice. |  | Thread Tools | Search this Thread | | | | 
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