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PostPosted: Wed Aug 17, 2022 7:42 pm 
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Koa
Koa
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Joined: Sun Feb 27, 2005 10:11 am
Posts: 1952
I was really fortunate to obtain A piece of a set of Koa thick enough to make an archtop out of.
it is really beautiful piece to boot ! Dead quartersawn from end to end, nice curl and beautiful color.
I’ve been looking for years and years for a piece of wood like this and I just stumbled onto it.
I was also able to source a one piece Koa neck blank from Bruce at Notable Woods.
All the appointments are ziricote.
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These users thanked the author Brad Goodman for the post (total 3): James T (Fri Aug 19, 2022 7:51 am) • Chris Pile (Thu Aug 18, 2022 12:11 am) • rbuddy (Wed Aug 17, 2022 8:31 pm)
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PostPosted: Wed Aug 17, 2022 8:32 pm 
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Cocobolo
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Joined: Sun Jun 02, 2013 8:16 am
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First name: Brian
City: U.P.
State: Michigan
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Beautiful guitar Brad!

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PostPosted: Thu Aug 18, 2022 1:19 am 
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Joined: Fri Jul 10, 2009 4:44 am
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First name: colin
Last Name: north
Country: Scotland.
Focus: Build
Status: Semi-pro
Stunningly elegant Brad.

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The name catgut is confusing. There are two explanations for the mix up.

Catgut is an abbreviation of the word cattle gut. Gut strings are made from sheep or goat intestines, in the past even from horse, mule or donkey intestines.

Otherwise it could be from the word kitgut or kitstring. Kit meant fiddle, not kitten.


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PostPosted: Thu Aug 18, 2022 6:41 am 
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Joined: Wed Oct 08, 2008 11:36 am
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Location: Southeast US
City: Lenoir City
State: TN
Zip/Postal Code: 37772
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Very, very nice and that Koa is indeed stunning!


Steve

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PostPosted: Thu Aug 18, 2022 7:30 am 
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Koa
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Joined: Sat Mar 09, 2019 4:50 pm
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Location: Goodrich, MI
First name: Ken
Last Name: Nagy
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State: MI
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Very nice Brad. It has flame too! Nice.

I like the simplicity, and the bold f holes. When it's done, give us a listen.

I bought some Koa scrap pieces at Woodcraft a while.ago, and have a violin back roughed out but not finished. It feels and works.like no other wood I've used. It seems light and dry and resonant. Like a much lighter version of Padauk, but even stiffer. How does that happen? Maple rarely feels like that. How that relates sound wise, I don't know. Clear? Loud?

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PostPosted: Thu Aug 18, 2022 7:55 am 
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When it's done, I want to hear it - ok?

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PostPosted: Thu Aug 18, 2022 8:30 am 
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Old Growth Brazilian Rosewood
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Location: Ann Arbor, Michigan
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Very cool!!

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PostPosted: Thu Aug 18, 2022 8:55 am 
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Brazilian Rosewood
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First name: Brad
Last Name: Combs
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That will be great! Also hoping to hear it. :)


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PostPosted: Thu Aug 18, 2022 2:27 pm 
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Brazilian Rosewood
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Joined: Fri Dec 14, 2007 3:21 pm
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Sweet! Was the back hard to carve? How did you do it?

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PostPosted: Thu Aug 18, 2022 3:11 pm 
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Koa
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Joined: Sun Feb 27, 2005 10:11 am
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Ken Nagy wrote:
Very nice Brad. It has flame too! Nice.

I like the simplicity, and the bold f holes. When it's done, give us a listen.

I bought some Koa scrap pieces at Woodcraft a while.ago, and have a violin back roughed out but not finished. It feels and works.like no other wood I've used. It seems light and dry and resonant. Like a much lighter version of Padauk, but even stiffer. How does that happen? Maple rarely feels like that. How that relates sound wise, I don't know. Clear? Loud?



Ken,

To me, the closest thing to koa as far as carving and weight is honduran mahogany. I have only made flattops with koa backa nd sides asn spruce tops and again to me it has attributes of light mahogany.


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PostPosted: Thu Aug 18, 2022 3:13 pm 
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Koa
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Chris Pile wrote:
When it's done, I want to hear it - ok?


Chris, I will put up a sound clip when it is done.

I am a ragtime player so I will have to find a Jazz guy to demo it as well.


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PostPosted: Thu Aug 18, 2022 3:20 pm 
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Koa
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Posts: 1952
Terence Kennedy wrote:
Sweet! Was the back hard to carve? How did you do it?


Terrance,

No, it carves and sands easy like mahogany.

I did my usual Lancelot carver to rough it out,then 36 grit on the 4" grinder,then 60 grit on the 6" Festool.I also do some thicknessing with a round bottom plane.
After its' all together including binding I use a scraper for the recurve and finish sander with the 5" Festool and sand out to 180 grit.

As I have mentioned before it only takes me about 2 hours to rough out a plate using this system.


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