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Adamas II 1581 Rebuild

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Oldvation Guy
Posted 2019-11-02 8:48 PM (#550301 - in reply to #549891)
Subject: RE: Adamas II 1581 Rebuild


Joined:
May 2011
Posts: 42

Location: Ozark, Arkansa
And there is the unglued top on the bowl. Starting to look like an Adamas again!



(IMG_1537_01.jpg)



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Attachments IMG_1537_01.jpg (81KB - 0 downloads)
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Love O Fair
Posted 2019-11-04 6:27 AM (#550328 - in reply to #549891)
Subject: Re: Adamas II 1581 Rebuild



Joined:
February 2016
Posts: 1178

Location: What week?
What an amazing journey this is turning into. It could almost satisfy one's sense of morbid curiosity. Much like sitting in the observation gallery of an emergency operating room while a skilled and creative surgeon does their magic on a disfigured wreck victim. Heck, we even get to witness real blood. And seeing that chunk of cut off treble bout laying in the background makes it all that much more gory. Nice work, Doc!
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clrules
Posted 2019-11-05 5:10 AM (#550355 - in reply to #549891)
Subject: Re: Adamas II 1581 Rebuild


Joined:
September 2005
Posts: 117

Location: Birmingham, AL
<p>Looks like the modifiied treble soundhole is going to look excellent. I like the red top also! Really a great job so far!!</p>

Edited by clrules 2019-11-05 5:15 AM
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clrules
Posted 2019-11-05 5:10 AM (#550356 - in reply to #549891)
Subject: Re: Adamas II 1581 Rebuild


Joined:
September 2005
Posts: 117

Location: Birmingham, AL
<p>Duplicate post</p>

Edited by clrules 2019-11-05 5:13 AM
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Oldvation Guy
Posted 2019-11-08 8:43 PM (#550420 - in reply to #549891)
Subject: Re: Adamas II 1581 Rebuild


Joined:
May 2011
Posts: 42

Location: Ozark, Arkansa
So, I still have more work to do on the bowl repairs, but I am starting to get ready for the top. Dan, what do I need for epoxy, or will hide glue work? Is the adhesive for the bridge the same as the top? And in one of your posts, I think you mentioned using balsa wood for bracing. Obviously this top is already braced, but I am thinking about my next build. I would think balsa is too flimsy. What is up with that?
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Oldvation Guy
Posted 2019-11-09 5:55 AM (#550424 - in reply to #549891)
Subject: Re: Adamas II 1581 Rebuild


Joined:
May 2011
Posts: 42

Location: Ozark, Arkansa
BTW, my next experiment is going to be a longleaf pine (yellow) top, with no added bracing. I have an Ultra with a trash top, but a really good bowl and neck, as the recipient body.

I found a quartersawn 16' clear 6" plank at my local lumberyard. Wide grain, but I think I might like that effect. If not, I can stain or paint it.

So now you are wondering, how am I going to make a strong resonant top without adding bracing...?

Mwaaahahahah...

Edited by Oldvation Guy 2019-11-09 5:57 AM
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Oldvation Guy
Posted 2019-11-09 11:34 AM (#550426 - in reply to #549891)
Subject: RE: Adamas II 1581 Rebuild


Joined:
May 2011
Posts: 42

Location: Ozark, Arkansa
Decided to get most of my fiberglass work done today. I will be pretty close to being finished, if not complete, by the end of the day. I will probably do some minor sanding, but hey, no one will ever see this on the inside of the bowl. I have to rein in the perfectionist in me so I can get this done!

Repairing the suspension ring has been interesting on the bass side upper bout. I will trim the excess glass after I have it up to thickness.



Edited by Oldvation Guy 2019-11-09 11:38 AM




(IMG_1546.jpg)



(IMG_1548.jpg)



(IMG_1549.jpg)



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Attachments IMG_1546.jpg (41KB - 0 downloads)
Attachments IMG_1548.jpg (47KB - 0 downloads)
Attachments IMG_1549.jpg (38KB - 1 downloads)
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DanSavage
Posted 2019-11-09 11:46 AM (#550427 - in reply to #550420)
Subject: Re: Adamas II 1581 Rebuild



Joined:
June 2012
Posts: 2061

Location: Lake Forest, CA
Oldvation Guy - 2019-11-08 6:43 PM

So, I still have more work to do on the bowl repairs, but I am starting to get ready for the top. Dan, what do I need for epoxy, or will hide glue work? Is the adhesive for the bridge the same as the top? And in one of your posts, I think you mentioned using balsa wood for bracing. Obviously this top is already braced, but I am thinking about my next build. I would think balsa is too flimsy. What is up with that?


Hi Steve,

Unfortunately, hide glue only works on wood-to-wood joints.

I use Hysol 0151 for most of my Ovation work including top and bridge gluing. It works on all types of glue joints. McMaster-Carr sells it. It's a little pricey at $20/cartridge.

You'll need to buy the applicator gun (~$24) to go with it as the cartridges lack external plungers. It is sold in tubes, but the mix ratio for it is 2.7:1 by volume.

Generally speaking, the longer an epoxy takes to cure the more rigid it will be once it is cured. The faster it cures, the more rubbery it will be. Also, I like the longer working time I get from slow-cure epoxies like 0151. It makes it easier to clean up before the glue cures hard.

I use balsa for cauls, such as the bridge-clamping caul, not the braces. It's soft enough so it doesn't mark the bridge and it's easy to shape.

These days I like using torrefied Adi spruce for the braces regardless of what species of wood is used for the top. Of course, these days I only use torrefied wood for the top.

I would not use torrefied braces on a non-torrefied top, nor would I use non-torrefied braces on a torrefied top.

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