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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 DiscussionRepair and Restoration

Pedulla Bass Truss Rod

Hello, Looking for any suggestions for replacing the missing hex nut on a Pedulla Bass. This is not a standard size and from limited past experience this is fixed to the end. A flat 5-6 mm nut seems to fit but not securely without removing material under the nut shelf. Thank you, Mark Images

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Ian Davlin
Private member DiscussionAcoustic Repair

Harmony H167 Neck Reset...

Hey everyone, recently I've been getting more requests for neck resets from customers, and up until this point I haven't been offering them since I don't have the practical experience. I'm keen to change this, and I've borrowed my fathers Harmony H167 that has seen better days. I've done an initial cleaning and assessment, the truss rod works although I may need to force it into a backbow to have a fully adjustable neck. This shouldn't…

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Private member
Also you have to take into account how much flex the top has. If you could set the neck dry then clamp it and string it up you can start the calculations about how much you to take off of the heal. In…
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

1964 jazz bass calamity

Any suggestions if this can be saved? It is a neck I received for free upon replacing it for a customer. The wood was missing and the rod is missing the adjusting nut. The truss rod had pushed the inlay out as well as the wood damage . I wasn't sure if it could be a structurally sound repair. I have no idea of the neck rigidity or action with strings. I wont be online because of a previous dr. appointment but I figured it would be a go…

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The Elders are correct .It is a 1976 neck. I was presently working on a different neck , a 1965, so it was on my mind. Thanks to all for the suggestions. My initial instincts were what Doug had reco…
Private member DiscussionElectric Repair

Can't access truss rod

I bought a boutique guitar, used from Guitar Center. I really want to like this guitar. I just got it a couple of days ago. Looking forward to doing a setup. The neck is straight. I went to add some relief and found that the wood around the truss rod keeps the 4mm hex key from engaging. Any suggestions on how to hog out enough wood to get access? I was thinking of superglueing some 180 sand paper to a 4.5 mm hex key and sanding the…

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If I really liked it (or it was a client's guitar) - I might go fearless with a drill bit on a low setting to remove some material for access.
Private member DiscussionElectric Repair

Early 80’s Jazz Bass Fingerboard Separation— Bi-Flex? Washer issue?

This jazz bass has come in with a cracked and separated fingerboard near the nut. I believe this is an early Bi-Flex but am not entirely sure or familiar with them. The truss rod is functional and tightens up when turned. Top of the walnut plug is missing and the washer appears to be crooked or dislodged. Not sure what purpose that washer serves. This is probably the thinnest bass neck I’ve ever seen and it’s no wonder that this fingerb…

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Good call Ian, I can definitely get strings on there. I suspect it won’t do well under tension. It’s incredibly thin, neck has pretty much a shallow v profile. Hardly any fingerboard too. Might need a…
Private member DiscussionElectric Repair

Dealing with a zero fret...

Hey everyone, I have a Vaccaro bass guitar and I'm getting a lot of open note buzz on it. In truth, the bass could stand a refret but that may or may not be in the cards. Additionally, the truss rod nut is stripped. I'm also wondering if this nut is designed to come out? I imagine it is but it's kind of funky. A 1/4" Allen wrench is still too small to grip it. So the questions: 1. How would you deal with the zero fret and the nut? The st…

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The divots in the zero fret almost look intentional, though that doesn't make sense since one of the big advantages of a zero fret is that it can be levelled together with the other frets. Are the fr…
Private member DiscussionAcoustic Repair

Truss rodding an old Martin

My usual trick is to shove carbon rod down the square tube, but this chap is adamant he wants a proper truss rod installed. And he's willing to pay, more importantly. He also wants it converted to a cutaway, but first things first. Anyone experienced in this area willing to offer a bit of guidance?

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Ian Davlin
Im reaching out to Dan to see if I can get him to give you the lowdown on this. It has been done.
Private member DiscussionElectric Repair

Just one string buzz from 1-12 even with really hi action.

I work in guitar repair for over 20 years and this strange buzz happen only 3 times and i really going crazy. Five years ago a all parts strat neck in G string, change string, leveling frets twice thinking i made a mistake, in some point i made a rudimentar neck jig to tried to repair that neck. Work in that guitar for 3 weeks and string heigth like 3.5mm and yeat, buzzing with not so hard picking just the G, even in other tuning like F…

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Thanks Ian! It’s a brand new guitar, client contact the dealership and it’s in process to return and get other one. I really want to open and understand why this happened, not know why it’s a big bumm…
Private member DiscussionElectric Builds

Truss Rod Length - Is there a "rule of thumb"?

Friends - My "go-to" truss rod for my basses has been the rod sold by LMII; however, since they are now out of business, I am evaluating what other rods are suitable for bass guitar necks. The attached photos are all showing truss rod lengths from the front edge of the nut slot location on the blank. One photo shows my last LMII rod (23 1/2" in length) vs. 2 other rods, one longer (23 11/16") and one shorter (22 1/4") -- all measured f…

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I think that the 22.25 is fine to run. It lands over the neck pocket and those last few frets are getting sanded down to create a fall off anyway. Have you ever thought about changing the design and…
Private member DiscussionAcoustic Repair

Fretboard hump above fret #12

Is it a common problem for the fretboard on an acoustic to develop a hump around Fret #12 and higher, where the neck meets the body? If so, what is the cause, and is there something that can be done, or avoided, during the initial build process? I have two quality Zager brand guitars that both have the problem, with the problem being worse on the cheaper model. I am a newbie to fret dressing and lowering, so I first tried adjusting the…

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Thanks for a great answer. I am a retired sonar engineer, so your explanation makes perfect sense to me. I figured it had to be almost an endemic problem with acoustic guitars.Next question: Can you r…
Private member DiscussionGeneral

Martin D-18VM No truss rod?

In the process of evaluating the repairs needed on this guitar I checked to see if the truss rod was working. There is hole in the transverse brace where you would normally insert a truss rod, but all I see is the end of a metal bar with a smallish hole in the center. I tried several allen wrenches that would fit in the hole, but nothing seems to grab. Did they really eliminate the adjustable truss rod on this vintage reproduction? Here'…

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A reproduction with that much wrong?!?! Did the thing go of a cliff in the back of a car without a seat belt, get thrown, and wash up 10 miles south?