Acoustic/electric dreadnaught, adjustable neck

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Peter Wilcox
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Acoustic/electric dreadnaught, adjustable neck

Post by Peter Wilcox »

After several years, I thought I'd try my hand at an acoustic guitar again (besides resophonics.)

Back, sides and neck are mahogany, top and headstock veneer spruce, bridge osage orange, fret board Honduran rosewood. It differs significantly from the usual build in that it has a solid body type neck pocket and heel, a Smallman type adjustable neck (and an overly large head block to accommodate), double X bracing, flying buttresses, a zero fret and straight pull to tuners. The head stock inlay is a Mexican 5 peso coin.

It has some cosmetic defects, as do all my builds, but if I live long enough I may make a perfect guitar some day. :)
top1.jpg
back.jpg
side-view.jpg
heel-strap-button.jpg
headstock.jpg
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Bob Francis
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Re: Acoustic/electric dreadnaught, adjustable neck

Post by Bob Francis »

Really nice!

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Peter Wilcox
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Re: Acoustic/electric dreadnaught, adjustable neck

Post by Peter Wilcox »

A few more pics.

Bracing.
CF-struts.jpg
Neck assembly. The Allen screw adjusts the neck angle, accessed through the hole in the fret board. The striker plate is the 3rd drywall screw. String tension holds the neck in place.
neck-assembly.jpg
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Bryan Bear
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Re: Acoustic/electric dreadnaught, adjustable neck

Post by Bryan Bear »

Cool!
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Steven Wheeler
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Re: Acoustic/electric dreadnaught, adjustable neck

Post by Steven Wheeler »

Nice neck adjust Peter. My initial attempt at this was similar to yours but for some reason I couldn't work out the hinge to my satisfaction. You make it look simple. In the end I found some brass hardware and accomplished the same thing in a different manner.
My only worry with the system is that in time the end of the neck may "ski ramp" but the three I've built ranging from 2 to 10 years old show no signs of deformation. I skipped the intonation adjustment after the first one as it became apparent that it was unnecessary.
I like that massive neck block coupled to the UTB. I've added that detail to my standard neck guitars also.

Here's a couple of pics of the original during the build. Action adjust is the same as yours and intonation I adjusts through the soundhole just below the trussrod.
Attachments
430.jpg
429.jpg

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Peter Wilcox
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Re: Acoustic/electric dreadnaught, adjustable neck

Post by Peter Wilcox »

Hi Steven. Your design looks like it is very stable due to the metal parts which I assume fit fairly tightly together. I think part of the reason mine works well is because of the tight fit laterally of the neck into the pocket. I have to force it in and it easily stays in position without any strings on. I could adjust the intonation a small amount by putting a shim in the groove in the neck, or by adjusting the position of the retaining block that is screwed into the pocket. I'll hope the neck doesn't ski ramp, though a small amount shouldn't cause any problems.

The neck block is made of oak, as it was the strongest wood I had available. However, it is heavy, and for future builds I will pare it down and use a lighter wood - maybe alder, since I have plenty of it. I like that it includes the UTB, but will also make that lighter since the CF buttresses should take a lot of the stress off the upper bout.

If you (or anyone) has any suggestions on how to improve this, please post.
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Peter Wilcox
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Re: Acoustic/electric dreadnaught, adjustable neck

Post by Peter Wilcox »

Finished another one of these: Mahogany neck, back and sides; spruce top; headstock, rosette, bridge, bindings spalted something (don't know what); Honduran rosewood fret board. I know bridges shouldn't be spalted, but this is a pretty solid piece of wood (time will tell.) Cheap UST and mic with preamp in the side (I know a lot of folks don't like this, but it was cheap and convenient) with blend, and sounds pretty good.

I love the adjustable neck - I can tune the action in perfectly to suit my playing style (light fingerpicking), and should never need a neck reset.
top.jpg
back.jpg
oblique.jpg
oblique-back.jpg
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Peter Wilcox
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Re: Acoustic/electric dreadnaught, adjustable neck

Post by Peter Wilcox »

A few more pics:
hradstock.jpg
bridge-rosette.jpg
heel.jpg
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Karl Wicklund
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Re: Acoustic/electric dreadnaught, adjustable neck

Post by Karl Wicklund »

I really like the spalted whatever. It ties especially well between rosette and bridge.
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Clay Schaeffer
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Re: Acoustic/electric dreadnaught, adjustable neck

Post by Clay Schaeffer »

Nice looking guitars Peter,
Adjustable necks kind of grow on you. One side affect of the travel guitar design I use is that the action is adjustable if some relief is added to the neck pocket. It uses a single socket head cap screw to attach the neck and adjust the angle. String tension acts as the counter force.
I'm pretty sure it would work with a glued down fretboard extension if a little head space was allowed at the top of the pocket.
Attachments
siz 2 action 1.jpg
siz 2 action 1.jpg (73.1 KiB) Viewed 1680 times
siz 2 action 2.jpg
siz 2 action 2.jpg (67.8 KiB) Viewed 1680 times

Matthew Lau
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Re: Acoustic/electric dreadnaught, adjustable neck

Post by Matthew Lau »

I really like your joint Peter.

Can I copy/use it on a future build?
I'll be building an acoustic bass guitar with nylon string.

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Peter Wilcox
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Re: Acoustic/electric dreadnaught, adjustable neck

Post by Peter Wilcox »

Hi Matthew - it's not really my design, just sort of a modification of the Smallman neck, without the usual heel (which I decided was unnecessary structurally), so help yourself. Some people are probably offended by the lack of heel - I think it helps reach the upper frets if no cutaway. Good luck with the build!

Here's the link where I found some pics (courtesy David Schramm) and a diagram of his neck (about halfway down): https://www.classicalguitardelcamp.com/ ... 4&start=15
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Max Dickinson
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Re: Acoustic/electric dreadnaught, adjustable neck

Post by Max Dickinson »

That's beautiful, I love the adjustment in the heel block, so easy to use. This is really similar to the adjustable neck that I use.

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