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Private member DiscussionDiscussions

D28 blowout

Hi all, I'd like to get some input on how to address this top blowout. For starters I own this, I got it as a project guitar, 71 D28. I'm not as experienced with acoustics as electrics and this is a big project but I got it to learn new skills and I'm confident I can do it with guidance. It had been stored in the case for many years under tension and was way too humidified. The bridge had pulled up I assume in stages. The center seam se…

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Ian Davlin
Chris, can I add this for the council of elders show ? Also, we are going to have @member on pretty soon to talk about a job about this dramastic. Here's a link to the live show co…
Private member DiscussionAcoustic Builds

Neck block for adjustable neck -thoughts on design

I've built a number of classical guitars with an adjustable neck and they seem to gather quite a bit of interest, so i'm currently in the process of looking to refine the design and build. It's quite a simple construction where the neck is held together by string tension and hangs on a pivot. I developed a 3d printed "socket" which acts as the interface between the body and the guitar and allows for some fine tuning of the alignment of t…

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Not really answering your question but I've done a version of the Smallman/Gore joint (I think it's really just Smallman but whatever) on all my guitars (nylon/steel/gypsy). I'm not particularly conc…
Private member DiscussionAcoustic Repair

1930s Martin 00: Best practice

Long story short, customer want to add carbon fiber in the neck for strength. Without string tension, the neck is dead straight; with strings, it's about double the relief he'd like. Is it insane to add carbon to this guitar? Or is it fine?

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Hey Keith! That's a bit of a tough question to answer without having more details, but I'll take a swing at it. If, as you said, the neck is dead straight without strings and has double the relief he…
Private member DiscussionElectric Repair

Bass Neck Stiffness, Can't Get Enough Relief

Hello, I hope everyone is having a great 4th of July weekend so far. I was recently asked by a friend to work on a cheap S101 bass someone had given to him. It had no electronics and it was severally back bowed. After finishing up the electronics, I did the set up. He wanted the guitar tuned low, to Drop C. So, I went out and bought some Ernie Ball Power Slinkies 55-110. Once I got to the nut depth check, it was clear there were large, g…

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9m✎🗑 A standard heat treatment, with the neck clamped in an upbow, should help. I have been using an Aria neck heat bar for 50 years with more successes than failures. You can find the Aria on eBay for…
Private member DiscussionNeck Reset Database

Washburn Neck Reset

I am working on a neck reset on a Washburn Parlor - SN 283552. I have read that the 28 in the SN indicates that is was built in 1928, but the owner thinks based on her research that it was built before 1920. I am assuming a dovetail joint and that I can get into the neck joint for steaming by drilling into the 13th fret slot, but if anyone knows differently please let me know. The fingerboard extension has already separated slightly…

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Ian Davlin
Love the truss rod let in to the top!
Private member DiscussionFolk, Bluegrass, Irish, Old Time Instruments

tenor banjo neck attachment?

Hi, I am in Germany and do not know anything about banjos really, because they are not too common here. I repaired a tuner and changed the tailpiece on this instrument. I wanted to put strings on the instrument, but the neck is so wobbly. At first I thought, this has something to do with string tension, but it moves sideways. Is there a good video on how to set up those instruments? It doesn t seem to be easy to take the back of? Or is eve…

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well, that is not what I have expected lol:-)
Private member DiscussionElectric Repair

The Neverending Fret Buzz

Hi everyone, Every once in a while, I come across a bass that simply refuses to stop buzzing. Right now, I’m working on a bass (I won't name the brand, but it’s in the €2,500 range) that has a slight fretboard hump near the neck pocket. I figured that was the culprit, so I performed a fret level under string tension. The frets are now perfectly level... yet, it continues to buzz across the entire fretboard, even with fairly high a…

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After further testing on a bass with the same issue, I discovered that in some basses, the neck has a specific resonant frequency. This causes the neck to vibrate, making the string move erratically.…
Private member DiscussionAcoustic Repair

Weird situation with PRS SE Angelus acoustic truss rod

I've got a PRS SE A50E acoustic in with complaints of high action. Checked the relief and it was sky high. Tried to flatten it, and it wouldn't go, so I started experimenting. When there's no string tension and the (single action) truss rod is slack, there's loads of relief. Tightening the truss rod works fine and the nut turns easily until the neck is flat, then resistance goes up but the neck won't go past dead flat. It behaves as…

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Ian Davlin
With all that extra relief it's probably hard to tell, but is this a double action rod? As far as compressing into a back bow, it can be done if the untensioned relief isn't crazy. It dounds like you…
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 DiscussionGeneral

Can a fingerboard shrink in 3 hours??

I replaced a broken trussrod in a mandolin today, and after gluing the fingerboard back on I was surprised to feel a small ledge on either side of the board suggesting that in the 3-hour period since removing it, the board had shrunk over its width. It was definitely flush before I removed it, and I used the same locating pins as the original builder, so it can't have shifted. Is it possible that the board could have shrunk that quick…

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Ian Davlin
An alternate explanation may be that the neck expanded. Which glue did you use ?
Private member DiscussionElectric Builds

Nut slot and action trouble

Hi everyone - I recently ran into trouble making new nut for one of my necks that needed to be trued and re-fretted. I roughed in the nut as usual and then, with the bass guitar fully assembled and strung up, I started cutting the slots to depth. I use the StewMac digital nut slot depth gauge and have had good results in the past. I marked the nut's lowest points (radiused) using the guitar nut scribe tool (first time using this!) and c…

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Ian Davlin
That's actually not how that tool was intended to be used. That is essentially plotting a like to the top of the fret. With a bass, you would need much more than that. When James and I came up with th…
Private member DiscussionAcoustic Repair

reality check - bridge repair - Epiphone PRO-1 Plus VS

I got this guitar for free hoping to further my skills and experience in guitar repair. I removed the bridge. its not in good shape and I don't think I can glue it back together with any hope of it holding tension again. I haven't been able to find a replacement that is of the same shape and dimensions. Epiphone/Gibson is no help. The top of this guitar is not at all flat. I don't know if I should try to flatten it before attempting to…

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Hi Mitch - The string spacing on that new bridge is probably too wide. I googled the Epiphone, and if the AI is right, it says the spacing is a narrow 2 3/64" (52mm). You may be able to buy one with…
Private member DiscussionGeneral

Strange Fender neck with some problems.

Hello fellow looths! I recently had a customer come in with a '71 Fender neck that is a fusion of the 60s and 70s style. It has a veneer fretboard, no skunkstripe, 4 screwholes, 70s style tuners, 70s headstock logo, and it seems like it has a poly finish on the back of the neck, and nitro (with cracking) on the front of the headstock. Can anyone tell me if this combination is possible or could it be fake? Another thing is, even without th…

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Hey Tony, thank you for your info, and sorry for the late reply. I don't spend much time in the loothgroup.. You have an amazing setup! The sheetmetal underneath is genius! I have to build something li…
Private member DiscussionTools and Jigs

Dome sander

Here are some pictures that show the basic elements of a dome sander I made. Critical part is a lawn mower blade bearing/spindle. Cost $63. It is marked part # 607418 Blade spindle assembly. It has a tap for a .625-11 bolt on the side I put facing upward to bolt on the disk, and a shaft with a keyway on the bottom to attach to the big pulley. I used a 11” diameter and 2.5” diameter pulley combination. This gives just about the perf…

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Another thing I forgot to add. The motor is mounted to a board connected to the chassis with a big ass hinge, so you can tension the belt with the spring
Private member DiscussionShare Your Repair Content

Weissenborn Top Separation

I had a very unique instrument come into the shop yesterday. It's an American built Weissonborn/lap guitar (*spelling). The top has separated from the kerfing and sides on the lower left bout, and was raised significantly while under string tension when the customer dropped it off. I have a two fold problem as I see it. Applying horizonal pressure to a very light and fragile instrument, and getting enough glue into the separation where…

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Hey KT, I do a few ideas about how to go about this one. If you'd like to discuss them, by all means reach out to me. Email is probably the best. My email is [email withheld]. we can set up…
Private member DiscussionAcoustic Builds

Neck gap at heel

Just finished my 7th acoustic guitar and have an issue that is perplexing me. Before putting strings on the guitar the bolt on neck fit very well. However after stringing up there is a tiny gap at the heel (please see pic). If I take off the strings (removing string tension) to floss the joint the gap isn't there. Does anyone have tips to remedy the issue?

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Ian Davlin
Neck block could be flexing. Threaded insert could be pulling out. How much have you coved out from the heel ? Do you have any pics of the neck and neck block not assembled etc ?
Private member DiscussionAcoustic Builds

more side bending

hello looths - i'm building my first guitar. generally following (and enjoying) the gore/gilet books. after 3 tries, i've yet to get a crack free bend around the nose of a venetian cutaway with a mahogany side. i made a version of the fox bender - using clamps on hand for the waist and cutaway, and a pid temp controller (verified accuracy), and am using a stew mac blanket and three straps. the recipe for my last attempt was: sapelle (fo…

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hey @member - so i substantially followed your recommendations with another test piece of sapele: spray with supersoft about 5 min before going into bender, wet down craft paper, spritz side wit…
Private member DiscussionAcoustic Repair

Loose Truss Rod Nut

Hi Folks, I'm new here so I appreciate any input upfront! I had this guitar come through the shop and I've run up against something for the first time. The neck needs a little relief but when I went to adjust the truss rod the screw was already completely loose thus I couldn't perform that action. I tightened it just enough to get the truss rod nut to connect to the truss rod without making an actual adjustment to the neck in the wrong dire…

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Ian Davlin
Sometimes the truss rod can hang up the adjustment if there is surplus glue etc in the channel. Sometimes you can free up the relief just by flexing the neck. I usually grab it by the headstock and pu…