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Michael Lloyd
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PostPosted: Wed May 23, 2007 2:59 pm 
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One way to find those hidden pitch pockets in a spruce top.

This is a Sitka “AA” top and by looking at it under normal light it’s hard to find any flaws like pitch pockets.



So after I’ve sanded the tops to between 4-3mm I’ll inspect them with a strong light in search of flaws. (Beauty marks.)

Here you can see a pitch pocket.



Now under normal light you can make out the flaw. Indicated here by the arrow.



By flipping the top over and viewing with a strong light you will be able to tell on which side it is closest to the surface. Usually the darker and larger the showing indicates that the flaw is closer to the side you’re directly viewing. As in the next picture which is the same flaw. For this top I decided to use the other side as the soundboard’s top surface and finished sanding to 2mm.



I didn’t find anymore.


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Steve Saville
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What exactly is a pitch pocket and why is it important to be able to find?

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Peter J
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Excellent post Todd !

   

It should be archived for future reference!

The only technical detail you omitted is the effect of pitch pockets on MOE and stiffness given the elastomeric nature of their contents.



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Bill Greene
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PostPosted: Thu May 24, 2007 1:21 am 
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Todd:

That is THE single best explanation of pitch pockets that I have, personally, ever heard. I had no idea why my dog whined so bad when I played...I thought it was me!

Thanks for the insight.

Bill

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WaddyThomson
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PostPosted: Thu May 24, 2007 1:24 am 
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So, does Shane's Lutz have more perfect pitch pockets than other spruces or just a better chance?  Also, do you suppose it would be possible to find the correct combination of pitch pockets to offset the problem with the G string on Classical guitars?

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crazymanmichael
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rotf lmao !!!!!!!!
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Bobc
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What?????

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WaddyThomson
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Rolling on the floor laughing, and In my arrogant opinion or possibly International Maritime Arbitration Organisation. 

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crazymanmichael
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it's an "L" waddy, not an "I"


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WaddyThomson
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OIC it is an l.  OOPS!  Explanation:  Laughin my elbow off.

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SteveCourtright
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An all along I thought "pitch pockets" had something to do with the game of Cricket and over-sized Tennis shorts...

Nice one Todd!

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Steve Saville
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I'm proud to have been Todd's straight man for that nice bit of humor.

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martinedwards
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I think I'll go & lie down now!!!

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