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SnowManSnow
PostPosted: Mon Dec 02, 2019 4:22 pm 
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Not saying I want to try to make one.... just trying to understand some things.
I looked up a builder who builds almost exclusively with no normal sound hole, but uses large sound ports.
He uSes an x brace system, but moves it forward quite a bit...
I haven’t touched one of these instruments, it how does such a thing normally change the time and resonant frequency? Bills also does it... if I remember correctly? But braces in a totally different way.
Anyone done one like this?


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Dave Livermore
PostPosted: Mon Dec 02, 2019 5:09 pm 
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I have made several.
They sound great.

Calculated of 98mm sound hole, then made sure there was that much area cut out of the side.

Opens up interesting bracing possibilities when you can work with the entire top.


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SnowManSnow
PostPosted: Mon Dec 02, 2019 5:25 pm 
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Dave Livermore wrote:
I have made several.
They sound great.

Calculated of 98mm sound hole, then made sure there was that much area cut out of the side.

Opens up interesting bracing possibilities when you can work with the entire top.


Does including the wood from the sound hole (not cutting it out) change how you thin the top? Seems it would add quite a bit of stiffness


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Dave Livermore
PostPosted: Mon Dec 02, 2019 9:59 pm 
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not thickness, definitely bracing.

Can do away with utb and actually get tone out of the whole upper bout
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CarlD
PostPosted: Wed Dec 04, 2019 11:40 am 
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Dave, What's your process for gluing and clamping the bridge on? I ask because I've been using pinless bridges lately.
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Chris Pile
PostPosted: Wed Dec 04, 2019 1:36 pm 
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You want crazy? How about mostly hole?


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bcombs510
PostPosted: Wed Dec 04, 2019 1:52 pm 
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Less sanding!

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SnowManSnow
PostPosted: Wed Dec 04, 2019 3:20 pm 
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Chris Pile wrote:
You want crazy? How about mostly hole?

Ha yea I’d say that one is mostly a hole haha


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Hesh
PostPosted: Wed Dec 04, 2019 3:46 pm 
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Give some consideration to how bridges will be clamped both for building and repair, bridges lift frequently.

Along the same lines consider how top, side and back cracks would be repaired should they happen and they do.

Then there are loose braces that need to be reglued.

Pick-ups also need to be installed and batteries secured and user replaceable.

Serviceability concerns appreciate sound holes.


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SnowManSnow
PostPosted: Wed Dec 04, 2019 5:13 pm 
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Hesh wrote:
Give some consideration to how bridges will be clamped both for building and repair, bridges lift frequently.

Along the same lines consider how top, side and back cracks would be repaired should they happen and they do.

Then there are loose braces that need to be reglued.

Pick-ups also need to be installed and batteries secured and user replaceable.

Serviceability concerns appreciate sound holes.

I wish I could recall the name of the luthier that builds a lot of these kinds of instruments. He was recently on the Podcast “luthier on luthier” ... his side ports are plenty big enough to access the inside, but working on a bridge would be an issue I imagine.


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