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Private member DiscussionAcoustic Builds

New Acoustic Build - Having trouble

Hi all. Brand new member. I’ve been building a classical guitar via kit from LMI for a couple of years now. I keep putting it off but recently became motivated to get back to it. Unfortunately LMI is out of business so I now have no one to go to to ask questions. I’m at the stage where I’m putting the sides together in the form. I followed the dimensions for the form based on the plans as I measured them, but the sides overlap pretty ba…

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Private member
Structurally you are fine. When you glue this up (this is important), make sure your sides are clamped in the form VERY snug so there are no gaps between the sides and the forms. This will leave the…
Private member Discussion3D Printing

Printed Vacuum Puck

Found this, will print later, saves a little design time. https://makerworld.com/models/1835300?appSharePlatform=copy Having made 3D printed Vacuum fixtures for CNC previously, I’d recommend printing as close to 100% theoretical density as possible, as any voids can and likely will lead to suction loss. Finer dimensional stability and layer adhesion with something with Glass Fibres will probably help. I’d avoid materials with additives th…

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Private member DiscussionAcoustic Builds

Any helpful tips with bar frets?

Hello, One of my commissions is coming down the pike and it's going to be my first time using bar frets. I could use a once over for any helpful tips if you have any. About the guitar: Aged HD-28 but mahogany back and sides. I think Martin called this a HD-28 M? Skipping the truss-rod and using two carbon fiber strips. My process for Frets: 1: I CNC my fingerboards to a 16" radius and for T-frets I use a .023" to cut slots with a mat…

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Ian Davlin
Depending on the carbon fiber strips and the gauge of string, you're compression may be moot, or at the very least, a fairly subtle factor. I would do a lot of testing before you glue the neck on to t…
Private member DiscussionFinish Repair

Airbrush recommendations

Hello, Apologies if this has been answered before, I couldn’t find any posts covering it. I’m looking to get started with an airbrush for small finish repairs. AI is telling me to get a Fengda 186 with 3L tank and a Harder & Steenbeck brush (not cheap!). But would appreciate recommendations for a budget setup from actual human people also. Thanks!

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most cheap ones will do you fine, what medium are you using? Nitro? 2k? Water based? 1k? you probably don't need to view more expensive options unless you're looking to get into detailed work. Iwata…
Private member DiscussionAcoustic Builds

GoBar deck adjustment

Hi folks, I thought you might be interested in this approach to having easy height adjustment for a GoBar deck. I learned this tip from my buddy, Don Parker. He lurks around here too from time to time. :) The basic idea is rather than having a booster platform on the base for use when gluing braces to plates you bring the roof down lower. There is a 3D printed spacer in black in the pics. I linked to a downloadable STL and 3MF of…

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Just FYI, as far as I know, go bars have the same clamping strength no matter how much they are bent. If you want a different level of force, you need a heavier go bar. Or vice versa.
Private member DiscussionElectric Repair

Neck Spline jig recommendations

Hey all - I've got a couple Gibson headstock repair investments that I'd like to practice inserting splines for reinforcement (or I may go the backstrap method..tbd). Do you have any jig recommendations or preferences? I've only seen the G&W option (which looks awesome), several ebay knock-offs and lots of DIY jigs. I welcome your feedback. Thanks and all the best, Chris

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Ian Davlin
I think this is my favorite. It's not my favorite technique overall, but this version, with the long splines that extend WAY past the transition of the neck is the best. https://mcconvilleguitars.blo…
Private member DiscussionGeneral

Workshops

Almost a year ago I complete a certificate program and became a journeyman luthier/ guitar tech. Looking to continue my education and I was wondering if there were any weekend workshops or anything similar in the north east/ tri state area that anyone would recommend? Thanks in advance! -Vinny

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Private member DiscussionAcoustic Repair

Maple bridge plates: plain versus rift/quarter sawn versus laminated

I'm fixing a cedar top guitar with a big bulge and a bad bridge plate. Ideally I'd like a replacement plate with optimal stiffness in both directions and a thickness between 0.090 - 0.100". After I flatten the top as much as possible, should I: 1. use plain sawn maple 2. use quarter sawn maple (if so, any recommendations for sourcing?) 3. make up a cross grain maple laminate with two 0.050 thick pieces Thanks for any advice, searched the sit…

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I was thinking of clamping it between 2 boards perhaps with a slight radius to counteract the top?
Private member DiscussionAcoustic Repair

1975 Yamaha FG200J Neck Reset

Before I hack into the Yamaha, I would like to get the opinion of the experts on a method of steaming the upper end of the guitar and ‘pressing’ the neck down to adjust the angle back to factory. There are several you-tubers that have tried and recommend it. My novice intuition is that even though it may work, wont the steaming of other areas of the body such as upper braces, etc, end up weakening the construction (glue stability) to…

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Thanks for all of the inputs. I am going to order the foam cutter package. I will try to post some pics of the FG200J. In the meantime, I just got done doing a neck reset of a crappy Fender that ha…
Private member DiscussionAcoustic Repair

Acoustic Guitar Neck Repair

Hi Everyone, I was given this guitar to harvest parts from and then throw into a fire due to a partial break in the neck. When I pull the neck to close the break the action is perfect so I'd like to fix it and then donate it. Can anyone show me what clamps to use to keep it closed after I glue it? Also, would you recommend strait wood glue or would you water it down somewhat to allow it to seep in further? Thanks in advance!

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Ian Davlin
What kind of cauls do you have at your disposal ? I would thing a radiused sanding block and an F-Clamp would get this back together readily. As far as the glue, you could start with watered down Tite…
Private member DiscussionFinish New Builds

Sparkle Burgundy Gibson Finish

Hi, I'm wondering how to achieve this color on a guitar. It's Sparkle Burgundy. I suspect the clear varnish has yellowed with age, which is why it has a coppery effect depending on the light. Can you recommend a varnish to achieve this effect? ​​Should I use a UV lamp after varnishing to age the varnish? Thanks in advance for your help.

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Ian Davlin
This is a guess, but I think that is a red translucent finish over bronze powder. Probably gold top powder. Some of the red has done been UVed out and the clear coats have turned yellow.
Private member DiscussionAcoustic Repair

Cracked x-braces on Guild F20

Looking for some advice on a repair for a 1966 Guild F20. The guitar top is significantly depressed (bowl shaped) around the sound hole. This is due to both upper x-braces being cracked as they tuck under the purfling. Also, the bridge is starting to pull off. Any suggestions on sequence of actions? Specifically, should I try to flatten the top area above the bridge and around the sound hole prior to fixing the x-braces? Would it be…

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Tony thanks for sharing this example. Your work really paid off! My top deflection is about the same (1/4" at the sound hole). It's interesting to me that you took the bridge plate off. When I reach in…
Private member DiscussionAcoustic Repair

Need advice on my first repair job

I would really appreciate some advice on this repair that I need to do. I've built a number of (classical) guitars so far, but this is my first repair job. I have already set the expectations with the customer that I can probably fix it structurally but the repair will be visible. The guitar is modestly priced and of no historical significance so it seems like an ideal project to take on as a first one. The guitar suffered a blow on the…

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It makes me realize how spoiled we are here in America. I shouldn't complain as to the time it takes to get stuff and that I can get it at all.
Private member DiscussionFinish Repair

Fender Tele Deeper Black Colour?

Hey all! Anyone know what lacquer pigment might better match the deep black colour of this tele body? It’s an American tele deluxe with a nitro finish. Photos show: Finish damage was the size of a quarter. I’ve filled and levelled the area and sprayed on coat of Oxford black nitro. I poured a puddle of naphtha on to check the match and unfortunately no dice. I’ve used Oxford black many times for overspray during repairs and have always fo…

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Black colour tone was absolutely the one that matched. Applied it with an airbrush and then did my clear with cans. Thanks again Ian.