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Soundboard Thickness for European Spruce? (Read 2839 times)
mtracz
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I love YaBB 1G - SP1!

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Soundboard Thickness for European Spruce?
May 6th, 2008 at 11:57am
 
All,

I am starting a couple tenor ukes with guidence from your book and plans.  How thick should a European spruce top be?  I know final thickness "depends", just looking for ballpark figure.

Also how thick should the spruce bridge patch be as I will be using a classical stye bridge rather than the steel string style with bead inside body?

Thanks in advance and I could post progress if anyone is interested... 

_Mike T.
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Matt Blacka
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Re: Soundboard Thickness for European Spruce?
Reply #1 - May 6th, 2008 at 1:15pm
 
Hi Mike,

I've spent ages hunting through previous posts on this forum, extracting info on approximate soundboard thiscknesses people use. I think what I finally worked out was that for spruce, people use about 0.08" - 0.09" (2.0 mm - 2.3 mm). For hardwoods like koa or mahoganny more like 0.06" - 0.07" (1.6 mm - 1.8 mm)

For the bridge patch, I'm not so sure about what thickness to use with a tie-block classical style. Generally people go for something about 0.07" if using a spruce patch on a spruce soundboard, but this is with a bead-end string situation, where the strings go through the bridge/soundboard, and a bead holds them in place against the inside of the bridge patch. I would think you would have to be no thicker than this, and in fact could probably go a bit thinner, as you don't have the intense focussed point load of a bead pressing against the patch.

Hope this helps a little,

Matt
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MAKAIO Ukuleles, Australia www.makaioukuleles.blogspot.com
 
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mtracz
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Re: Soundboard Thickness for European Spruce?
Reply #2 - May 7th, 2008 at 3:50am
 
Matt,

Thanks for your reply!

This helps a great deal.  Your info is what I used on my nylon parlor build and I just wanted to make sure it wasn't too stiff for a ukulele.

Another question...
If I'm building with Mahogany back and sides what do you recommend for their thickness?  I'm assuming in the .08" range. 

Again thanks for you help.  This is an amazing forum.

_Mt
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unkabob
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Re: Soundboard Thickness for European Spruce?
Reply #3 - May 7th, 2008 at 7:05am
 
Mike:
My honduras mahogany top and sides (that I sanded yesterday) were Top and back - 0.085 minus and sides - 0.075 minus. My sander gives about three thou difference on various points of the piece.

There is a thread somwhere on this board.

Bob
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mtracz
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Re: Soundboard Thickness for European Spruce?
Reply #4 - May 9th, 2008 at 5:54am
 
great

thanks!
If interested, I'll keep you posted on progress...

_Mike
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