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Build thread - Koa baritone

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bcombs510

Post subject: Build thread - Koa baritone

Posted: Sun Apr 25, 2021 3:02 pm

Brazilian Rosewood

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3603
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur

Here are some pics from a new build I’m working on. It’s a baritone shape that I modeled up in g-thang to mimic an L1.

Brad

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bcombs510

Post subject: Re: Build thread - Koa baritone

Posted: Sun Apr 25, 2021 3:05 pm

Brazilian Rosewood

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3603
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur

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bcombs510

Post subject: Re: Build thread - Koa baritone

Posted: Sun Apr 25, 2021 3:08 pm

Brazilian Rosewood

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3603
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur

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bcombs510

Post subject: Re: Build thread - Koa baritone

Posted: Sun Apr 25, 2021 3:11 pm

Brazilian Rosewood

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3603
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur

Installing lining...

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bcombs510

Post subject: Build thread - Koa baritone

Posted: Sun Apr 25, 2021 3:12 pm

Brazilian Rosewood

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3603
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur

Back braces...

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J De Rocher

Post subject: Re: Build thread - Koa baritone

Posted: Sun Apr 25, 2021 8:24 pm

Contributing Member

Joined: Mon Apr 16, 2012 12:47 pm
Posts: 2522
First name: Jay
Last Name: De Rocher
City: Bothell
State: Washington

This is going to be cool I'm a big fan of the L1 body shape. Maybe it's been done, but I haven't seen that shape used for an ukulele yet.

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These users thanked the author J De Rocher for the post: bcombs510 (Sun Apr 25, 2021 9:33 pm)

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edstrummer

Post subject: Build thread - Koa baritone

Posted: Sun Apr 25, 2021 9:15 pm

Cocobolo

Joined: Tue Mar 25, 2014 4:36 pm
Posts: 159
First name: Ed
Last Name: Miller
City: Wood Dale
State: Illinois
Country: USA
Focus: Build
Status: Amateur

Very cool. I am just starting a mold for a bari uke!! Thanks for sharing.

Last edited by edstrummer on Mon Apr 26, 2021 9:31 am, edited 1 time in total.

These users thanked the author edstrummer for the post: bcombs510 (Sun Apr 25, 2021 9:33 pm)

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Ruby50

Post subject: Re: Build thread - Koa baritone

Posted: Mon Apr 26, 2021 6:01 am

Contributing Member

Joined: Sun Feb 17, 2013 4:58 pm
Posts: 1449
First name: Ed
Last Name: Minch
City: Chestertown
State: MD
Zip/Postal Code: 21620
Country: United States
Focus: Build
Status: Amateur

Love the shape. Not just early L-1, but many of their guitars are this shape.

Ed M

These users thanked the author Ruby50 for the post: bcombs510 (Mon Apr 26, 2021 6:15 am)

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Barry Daniels

Post subject: Re: Build thread - Koa baritone

Posted: Tue Apr 27, 2021 1:34 pm

Brazilian Rosewood

Joined: Fri Aug 19, 2005 4:02 am
Posts: 3263
Location: The Woodlands, Texas
First name: Barry
Last Name: Daniels

I also use drafting triangles when laying out back braces. Perfect tool for the job.

These users thanked the author Barry Daniels for the post: bcombs510 (Tue Apr 27, 2021 6:06 pm)

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bcombs510

Post subject: Re: Build thread - Koa baritone

Posted: Sun Aug 08, 2021 6:05 pm

Brazilian Rosewood

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3603
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur

Been wading through some life stuff so very little shop time. I was glad to get a few hours today. I made a plate clamp caul on the CNC and then glued on the back.

I’m also experimenting with a template to help accurately cut out the notches in the braces. This one will be v-braced.

Brad

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Pmaj7

Post subject: Re: Build thread - Koa baritone

Posted: Mon Aug 09, 2021 12:27 pm

Contributing Member

Joined: Sat Jan 31, 2009 8:50 pm
Posts: 2257
Location: Seattle WA
Focus: Build
Status: Semi-pro

Looks ingenious Brad! How are you routing? Short pattern bit?

Pat

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bcombs510

Post subject: Build thread - Koa baritone

Posted: Sun Aug 29, 2021 5:02 pm

Brazilian Rosewood

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3603
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur

Pmaj7 wrote:

Looks ingenious Brad! How are you routing? Short pattern bit?

Pat

Hey Pat!

Sorry it took so long to reply. Yes, that’s right, a short pattern bit in the laminate trimmer. Here are a few more pics of the setup. I made two spacer rings to set the cut depth. One to set the depth for the V braces over the bridge plate and one for the cross brace notches. It’s all aligned together so well it stands on its own.

I’m waiting on some rosette materials to arrive before I cut the channel and soundhole. Once that’s done these will be ready to glue on.

Brad

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bcombs510

Post subject: Re: Build thread - Koa baritone

Posted: Fri Sep 03, 2021 9:29 pm

Brazilian Rosewood

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3603
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur

Binding and purfling arrived. Today I cut the rosette and sound hole binding channels with the CNC. Thats a first for me. Worked out great.

Brad

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bcombs510

Post subject: Re: Build thread - Koa baritone

Posted: Sat Sep 04, 2021 8:11 pm

Brazilian Rosewood

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3603
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur

Bit of progress today. I made a template to help placing the oddly shaped bridge plate. Line up the markings on the template, clamp it down with a couple go-bars, glue and place the plate. The cutout from making the template makes a perfect clamping caul.

Hope everyone is getting shop time on this long weekend!

Brad

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These users thanked the author bcombs510 for the post: Pmaj7 (Sun Sep 05, 2021 2:45 am)

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bcombs510

Post subject: Re: Build thread - Koa baritone

Posted: Sun Sep 05, 2021 9:29 pm

Brazilian Rosewood

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3603
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur

Box is closed! Binding is up next. I need to do some research on L1 end wedges.

Brad

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bcombs510

Post subject: Re: Build thread - Koa baritone

Posted: Mon Sep 06, 2021 9:23 pm

Brazilian Rosewood

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3603
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur

Had to make a new carrier for the binding jig. The guitar one from LMI is too big and my homemade uke one for tenors was too small. Repurposed an old IKEA shelf for it.

Brad

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bcombs510

Post subject: Re: Build thread - Koa baritone

Posted: Thu Sep 09, 2021 9:45 pm

Brazilian Rosewood

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3603
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur

This is one of my favorite parts of building, when you get to see it with a little shellac.

The pic with the tools shows the way I take small squared up bites off the binding to get a nice joint. It’s a cheap combination square taken apart. The slot where the ruler went is perfect for holding the binding up and squared.

First for me using ABS binding, it was kind of nice!

Brad

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J De Rocher

Post subject: Re: Build thread - Koa baritone

Posted: Thu Sep 09, 2021 10:40 pm

Contributing Member

Joined: Mon Apr 16, 2012 12:47 pm
Posts: 2522
First name: Jay
Last Name: De Rocher
City: Bothell
State: Washington

I like that idea of using the square. Pretty cool. I've been doing it free hand. I think I'll give that a try when I get to that point on the current instrument.

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These users thanked the author J De Rocher for the post: bcombs510 (Fri Sep 10, 2021 5:50 am)

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Pmaj7

Post subject: Re: Build thread - Koa baritone

Posted: Fri Sep 10, 2021 12:38 am

Contributing Member

Joined: Sat Jan 31, 2009 8:50 pm
Posts: 2257
Location: Seattle WA
Focus: Build
Status: Semi-pro

Yeah, good idea to keep it square! I mean, who would have thought about using a.... square? Lol

Pat

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Pat

These users thanked the author Pmaj7 for the post: bcombs510 (Fri Sep 10, 2021 5:50 am)

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bcombs510

Post subject: Re: Build thread - Koa baritone

Posted: Fri Sep 10, 2021 5:51 am

Brazilian Rosewood

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3603
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur

Pmaj7 wrote:

I mean, who would have thought about using a.... square? Lol

Pat

I know, right?

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These users thanked the author bcombs510 for the post: Pmaj7 (Sun Jan 02, 2022 12:25 pm)

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bcombs510

Post subject: Re: Build thread - Koa baritone

Posted: Sat Jan 01, 2022 10:28 pm

Brazilian Rosewood

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3603
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur

I’ve been working on a couple new projects (not all luthier related) and it’s been months since I’ve been In the shop working on an instrument. Super glad to have some time today to move this one forward.

Milled the fretboard on the CNC and cut the M/T for the body and neck. Good times!

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bcombs510

Post subject: Build thread - Koa baritone

Posted: Mon Jan 03, 2022 9:18 pm

Brazilian Rosewood

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3603
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur

A little more progress today. I managed to get the heel flossed in, the head plate on and trimmed, the carbon fiber rod glued in, the countersink into the block for the cap bolt, and the hanger bolt epoxied into place.

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Last edited by bcombs510 on Mon Jan 03, 2022 9:20 pm, edited 1 time in total.

These users thanked the author bcombs510 for the post: Pmaj7 (Tue Jan 04, 2022 12:06 am)

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bcombs510

Post subject: Re: Build thread - Koa baritone

Posted: Mon Jan 03, 2022 9:19 pm

Brazilian Rosewood

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3603
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur

Sent from my iPhone using Tapatalk Pro

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bcombs510

Post subject: Build thread - Koa baritone

Posted: Mon Jan 10, 2022 9:12 pm

Brazilian Rosewood

Joined: Mon Jul 27, 2015 8:21 am
Posts: 3603
First name: Brad
Last Name: Combs
Focus: Build
Status: Amateur

Made a 16” radius caul to clamp the fretboard during glue-up. The slots align to the pins at 1st and 13th frets to align the board. Made a head plate template for the baritone neck and routed the headstock. The CNC really scratches the OCD itch I think.

A few minutes with a scraper and 220 and voila - ready for porefill!

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These users thanked the author bcombs510 for the post (total 2): Durero (Wed Jan 19, 2022 12:38 am) • Chris Pile (Mon Jan 10, 2022 9:27 pm)

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J De Rocher

Post subject: Re: Build thread - Koa baritone

Posted: Mon Jan 10, 2022 9:22 pm

Contributing Member

Joined: Mon Apr 16, 2012 12:47 pm
Posts: 2522
First name: Jay
Last Name: De Rocher
City: Bothell
State: Washington

Looking good!

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Once in a while you get shown the light in the strangest of places if you look at it right - Robert Hunter

These users thanked the author J De Rocher for the post: bcombs510 (Mon Jan 10, 2022 9:56 pm)

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