Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Sun Dec 01, 2024 6:35 am


All times are UTC - 5 hours


Forum rules


Be nice, no cussin and enjoy!




Post new topic Reply to topic  [ 11 posts ] 
Author Message
 Post subject: Sound port finishing
PostPosted: Mon Sep 16, 2019 8:03 am 
Offline
Koa
Koa

Joined: Fri Feb 24, 2017 8:43 am
Posts: 1707
How do you guys choose to finish out your sound ports? What I mean is: after it’s all said and done what do you do to make it look like it something more than just a hole haha
Do you bind the area? If so how do you bend it that tight?
Do you add depth in some way?
Just curious
B


Sent from my iPhone using Tapatalk


Top
 Profile  
 
 Post subject: Re: Sound port finishing
PostPosted: Mon Sep 16, 2019 8:08 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Wed Oct 08, 2008 11:36 am
Posts: 7380
Location: Southeast US
City: Lenoir City
State: TN
Zip/Postal Code: 37772
Country: US
Focus: Repair
I use contrasting laminations for the backing, round the edges so it looks a bit organic and that's it. Of course I also do not do plain holes, if I just did a hole I would probably bind it.

If I recall correctly Alan Caruth had a nice method for binding the holes. I believe he bored a taperd hole then turned a matching tapered plug from contrasting wood; the result was very nice.
Image

_________________
Steve Smith
"Music is what feelings sound like"


Last edited by SteveSmith on Mon Sep 16, 2019 8:39 am, edited 1 time in total.


These users thanked the author SteveSmith for the post: SnowManSnow (Mon Sep 16, 2019 8:17 am)
Top
 Profile  
 
 Post subject: Re: Sound port finishing
PostPosted: Mon Sep 16, 2019 8:35 am 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Thu Feb 12, 2009 12:12 pm
Posts: 3293
First name: Bryan
Last Name: Bear
City: St. Louis
State: Mo
Country: USA
Focus: Build
Status: Amateur
I have been backing the side up with two more side thickness layers alternating grain directions. Then I cut the hole with a hole saw. I have a matching hole that I cut in some plywood (lined with packing tape) that I build my soundport binding in. I haven't figured out a good way to easily bend the binding; it is always a struggle. The thinner the layers the better. I make my strips with angled ends so when I glue them together in the plywood hole I can push the ends together like a scarf joint so force the ring tight around the hole. Once they are all laminated, they hold the shape. That ring slides nicely into the soundport since I used the same hole saw. Once it is glued in place I flush it up on the inside and outside.

I then glue in the side purfling scheme to the inside of the rim over the hole and cut the hole out and flush it up by hand. This carries the side purfling theme around the inside of the soundport binding. Hard to explain, but easy to see. Here is a picture of the first one I did that way. I get a little better each time. I'll try to hunt down some in progress pictures.

Image


Sent from my iPhone using Tapatalk

_________________
Bryan Bear PMoMC

Take care of your feet, and your feet will take care of you.


Top
 Profile  
 
 Post subject: Re: Sound port finishing
PostPosted: Mon Sep 16, 2019 8:43 am 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Thu Feb 12, 2009 12:12 pm
Posts: 3293
First name: Bryan
Last Name: Bear
City: St. Louis
State: Mo
Country: USA
Focus: Build
Status: Amateur
oops


Sent from my iPhone using Tapatalk

_________________
Bryan Bear PMoMC

Take care of your feet, and your feet will take care of you.


Last edited by Bryan Bear on Mon Sep 16, 2019 8:47 am, edited 1 time in total.

Top
 Profile  
 
 Post subject: Re: Sound port finishing
PostPosted: Mon Sep 16, 2019 8:45 am 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Thu Feb 12, 2009 12:12 pm
Posts: 3293
First name: Bryan
Last Name: Bear
City: St. Louis
State: Mo
Country: USA
Focus: Build
Status: Amateur
Here is the "mold" I make the ring in. You can see that you should think about what binding woods to use since you will have to deal with the way the scarf lines up. I would rather do the scarf the other way where the binding tapers in thickness (rather than width) but I haven't figured our how to make that work yet.


Image


Sent from my iPhone using Tapatalk

_________________
Bryan Bear PMoMC

Take care of your feet, and your feet will take care of you.


Last edited by Bryan Bear on Mon Sep 16, 2019 8:50 am, edited 1 time in total.

Top
 Profile  
 
 Post subject: Re: Sound port finishing
PostPosted: Mon Sep 16, 2019 8:46 am 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Thu Feb 12, 2009 12:12 pm
Posts: 3293
First name: Bryan
Last Name: Bear
City: St. Louis
State: Mo
Country: USA
Focus: Build
Status: Amateur
This demonstrates the scarf clamping I was trying to describe.

Image


Sent from my iPhone using Tapatalk

_________________
Bryan Bear PMoMC

Take care of your feet, and your feet will take care of you.


Last edited by Bryan Bear on Mon Sep 16, 2019 8:50 am, edited 1 time in total.

Top
 Profile  
 
 Post subject: Re: Sound port finishing
PostPosted: Mon Sep 16, 2019 8:46 am 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Thu Feb 12, 2009 12:12 pm
Posts: 3293
First name: Bryan
Last Name: Bear
City: St. Louis
State: Mo
Country: USA
Focus: Build
Status: Amateur
After you clean it up, it doesn't look too bad. this picture really shows the joint well. In person, it isn't that noticable now that the wood has oxidized. Still you want to position it strategically so it won't jump out at you.

Image


Sent from my iPhone using Tapatalk

_________________
Bryan Bear PMoMC

Take care of your feet, and your feet will take care of you.


Last edited by Bryan Bear on Mon Sep 16, 2019 8:52 am, edited 1 time in total.

Top
 Profile  
 
 Post subject: Re: Sound port finishing
PostPosted: Mon Sep 16, 2019 8:47 am 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Thu Feb 12, 2009 12:12 pm
Posts: 3293
First name: Bryan
Last Name: Bear
City: St. Louis
State: Mo
Country: USA
Focus: Build
Status: Amateur
Here it is installed in the rim. Hopefully this will show what I was trying to explain with the side purfling. This guitar only has a cherry veneer between the binding and side wood so I covered the installed ring with a cherry veneer then some side wood. After I recut the hole, the inside of the ring will mimic the side binding theme. This is also another good shot of the scarf joint.

Image


Sent from my iPhone using Tapatalk

_________________
Bryan Bear PMoMC

Take care of your feet, and your feet will take care of you.


Top
 Profile  
 
 Post subject: Re: Sound port finishing
PostPosted: Mon Sep 16, 2019 9:19 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Fri Jul 10, 2009 4:44 am
Posts: 5498
First name: colin
Last Name: north
Country: Scotland.
Focus: Build
Status: Semi-pro
I back the area to be routed for the soundport with 2 veneers, one about 1.5mm and a similar colour to the sides, with a contrasting veneer at 0.6mm cross plied between them, usually to match the binding.


You do not have the required permissions to view the files attached to this post.

_________________
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.


Top
 Profile  
 
 Post subject: Re: Sound port finishing
PostPosted: Mon Sep 16, 2019 10:32 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Sat May 17, 2008 1:11 pm
Posts: 2375
Location: Spokane, Washington
First name: Pat
Last Name: Foster
Country: USA
Focus: Build
This is a one-off based on the Greene & Greene designs of the 1930s.
Attachment:
IMGP9493.jpg


On a more conventional note, Chechen on BRW.
Attachment:
DSC_9624.jpg


The scarf joint will be tapered like Bryan's, making the OD somewhat adjustable.
Attachment:
DSCN1087.jpg


You do not have the required permissions to view the files attached to this post.

_________________
formerly known around here as burbank
_________________

http://www.patfosterguitars.com


Top
 Profile  
 
 Post subject: Re: Sound port finishing
PostPosted: Mon Sep 16, 2019 11:16 am 
Offline
Koa
Koa
User avatar

Joined: Wed Dec 07, 2005 9:08 am
Posts: 535
First name: Pete
Last Name: Liccardello
City: Eden Prairie
State: Minnesota
Like Steve and Colin, I prefer to do much the same. Contrasting laminations of veneer and an off-cut of the side material for backing.


You do not have the required permissions to view the files attached to this post.

_________________
Peter


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 11 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 35 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group
phpBB customization services by 2by2host.com