The Hub

The latest builds, repairs, and conversations from across Looth. Activity
Filters AND Search back brace× Type Discussions× Type Documents× Reset all
Private member DiscussionAcoustic Repair

Every back brace is loose?

Hello everybody! I've got a newer Martin Special 16 (all solid wood with matte back/sides and gloss top) in for some loose braces. Here in Houston I'm used to dealing with acoustics damaged by over-humidification or extreme heat rather than what I often see addressed in the group by you wonderful folks in your colder (normal) climates. My customer had this guitar shipped to him from Wisconsin, and I suspect it was exposed to some extreme…

LikeShare
Private member DiscussionAcoustic Repair

Loose braces - Martin D28

A customer brought a Martin D28 in for an assessment and below is the main issues with the guitar. It has two loose braces and two warped/broken "stringers" along the back of the guitar. In addition, the guitar is a candidate for a neck reset, although I think I can possibly kick that can down the road, and my main concern is the loose braces. I'm wondering what the best way to repair something like this is? I don't have much experience…

2 replies
2 replies
LikeShare
Ian Davlin
That guitar got wet. Probably from a humidification situation gone sideways. This is a borderline ruined guitar. You want to look at it on the loothalong ?
Private member DiscussionAcoustic Repair

1946 Gibson J-45

So this 46' J-45 came to me at a very very low price as it needs extensive repair. Much that I am confident in, cracks, bridge/bridge plate issues, loose braces and the like. There are however a few points that id like the groups opinions on. The neck angle is pretty great and theres a good amount of fret, however, at some point in its past, someone shaved down the neck to a dangerous point, and the back of the neck has toms cracks along…

3 replies
3 replies
LikeShare
Ian Davlin
That break in the neck is probably the truss rod breaking on through to the other side. That would require something radical to become stable. Maybe pulling the board, the rod and then layering some C…
Private member DiscussionFinish Repair

vintage finish repair

This is my mid 50's LG-1. I had the back off to replace the bridge plate and one of the braces. I've got it all back together now but I'm lacking the knowledge to make my work disappear. I was using amber CA glue to color the binding but that didn't seem like the proper route so now I'm scraping, filing and sanding that back off and starting over. I watched Doug Proper's demonstration on liquid binding repair and that did have a lot…

8 replies
8 replies
LikeShare
Private member
link?
Private member DiscussionAcoustic Repair

Replace broken back brace Gibson LG-1

Hello, This is my first discussion as I am new to this group. I am starting a restoration project on a 1957 Gibson LG-1. The first job on it that I want to tackle is to replace a broken back brace. It appears to be broken in half right on the center line (see pic one before the brace was removed). I have removed it and am gluing in back together (pic 2), just to get it strong enough to use as a template for fabricating a replacement…

7 replies
7 replies
LikeShare
Private member
Hi John, welcome to the Looth Group. Yes, Doug Proper's radius-sanding tool is wonderful - he should have invented it 50 years ago, and that really annoys me. However it is one of the most "why din't…
Private member DiscussionAcoustic Repair

Strange(?) bellying on Martin 000-15 SM

Just realized that I posted this on the main feed earlier and should have posted it here. Apologies for my poor posting skills. Will go and delete the original now.... Hello all, I’m new around here and excited to continue lurking and learning, taking in all the great content and the knowledge of all you experienced looths. I am more familiar with building than repairing, but I am interested in learning all I can about both. I’m happy to…

6 replies
6 replies
LikeShare
Private member
Yeah, I don't know. I would start by calling Customer Service. They will either direct you to a warranty operation for verification or if they let you send the pics, they might just issue a Return Aut…
Private member DiscussionAcoustic Repair

Wow, what a hole!

Long story short, Mom's sitting next to her guitar and POW, the bridge pops off taking part of the top with it. Now I'm trying to figure out how to fix it and I would like your feedback on my plan below. The hole is roughly the same size as the bridge. The top is a 3-layer laminate. The bridge, top, and bridge plate all came out as a single unit. The glue on the braces behind the bridge has failed, so the top will need to be re-glued…

1 reply
1 reply
LikeShare
Ian Davlin
Man, I would seriously consider retoping this. Im not sure I've seen anything quite that bonkers.
Private member DiscussionAcoustic Repair

Gluing Martin Alternative X Aluminum top back on???

I have one of those aluminum topped Martin Alternative X guitars in my shop where the top has broken free from the linings and braces. Does anyone have any idea what would be the best glue to use for this situation? Thanks!

8 replies
8 replies
LikeShare
Private member
Wow, integrated braces in a single piece aluminum top. That is intreguing. How does ot sound? Was the top domed? Have you ever done any guitar analysis on it? if not, check out Giuliano´s videos here…
Private member DiscussionDesign and Testing

Tips for measuring and drawing plans?

Hi dear luthiers, I want to build a copy of a vintage Gibson acoustic. Therefore I need to draw a good plan. Do you have good tips of how to measure the guitar, especially the interieur like braces or the back+side thickness? Do you have a certain schedule, that you follow? For the position of the braces I will use magnets. But the height, thickness and profile, how do you adress this? Thanks a lot in advance!

2 replies
2 replies
LikeShare
Private member
Thanks a lot fir the links :-)
Private member DiscussionElectric Repair

Busted acoustasonic strat

Anyone got any good tips for regluing a brace in an acoustasonic strat? I can get in there with a magnet and little violin clamp, but can't get effective pressure all the way down with those. Does someone make small scissor jacks? The gap between the top and back is 1.25 inches, so I can't fit even our cut-down normal one. I'd like something a little more elegant than wedging short sticks between the brace and back, but will use th…

3 replies
3 replies
LikeShare
Private member
Here it is clamped up.