Acoustic/electric dreadnaught, adjustable neck

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Acoustic/electric dreadnaught, adjustable neck

Postby Peter Wilcox » Mon Dec 02, 2019 6:36 pm

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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Re: Acoustic/electric dreadnaught, adjustable neck

Postby Bob Francis » Mon Dec 02, 2019 9:23 pm

Really nice!
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Re: Acoustic/electric dreadnaught, adjustable neck

Postby Peter Wilcox » Tue Dec 03, 2019 2:36 pm

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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Re: Acoustic/electric dreadnaught, adjustable neck

Postby Bryan Bear » Tue Dec 03, 2019 3:12 pm

Cool!
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Re: Acoustic/electric dreadnaught, adjustable neck

Postby Steven Wheeler » Sun Dec 08, 2019 9:41 pm

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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Re: Acoustic/electric dreadnaught, adjustable neck

Postby Peter Wilcox » Mon Dec 09, 2019 6:30 pm

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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