Building a 17" Archtop (C of A thru C)

Last page of the build of a 17" archtop guitar with Frank Finocchio in his Easton, PA shop.

Rough cutting the headstock shape.

I plagerized a modified Gibson shape but wasn't too happy. The curves on the side of the headstock cause the strings to come very close to touching at the machines because of the geometry. It's the same issue with using the standard inverted-triangle Martin headstock shape. To avoid this, the shape really needs to be more triangular in shape, i.e. wider near the nut and narrower at the top. It doesn't affect the sound; it just offends my eye. End of whine! :)

Leveling the fingerboard extension.
Drilling the tuning machine holes and the machine anchor holes.
Andy ready to glue the fingerboard.
We did binding on the fingerboards which you can see here on Andy'sneck. More mitering of course! We used thin CA to attach the binding and the joint seemed pretty fragile while we were working. By the next day it was solid.

My neck with fingerboard extension. At this point I still had to install a shim over the adjusting rod.

Note the hole in the bottom of the rim where the pickup jack is to be mounted. The hole is oversized for the jack, but it allows a hex-drive to be inserted to install the anchor bolt for the neck.

Cutting a small slot into the binding to accommodate an ebony block for the Saco strap for the tailpiece. Once this slot was trimmed...
... I could set the piece of ebony to take the load from the strap.
Cutting the mortise in the neck block. For the flat top guitars, the slot was already cut and all we did was trim away the side & top material to expose the slot.
Detail of the jig. Frank just mounted a carving board onto a 3/4" ply backing, then had us clamp the body in place. The jig is clamped to the upper body.
The bottom support of the jig which convenietly shows the ebony block in place.
Frank sketching the material that needed to be removed from the fingerboard extension in order to get the neck to seat properly. After it seated properly, the extension was marked again to indicate material that needed to be removed to allow clearance between the extension and the top plate.
The extension needs to bed solidly on the first 1.5", then a space is carved to allow the top plate to vibrate freely. This is the area where the curve of the top starts.
Looking a lot happier with the bound neck in place.
This clamping caul was used when gluing the neck joint. The fret grooves were unnecessary as the neck hadn't been fretted yet.
The caul was made from this radiused sanding block from Stew-Mac.

More sanding.

Bright, low angle light was mandatory to pick out what needed sanding. Once the lazquer is applied, the tiniest ding in the surface shows up like an ugly zit on a first date!

The frets are in (sorry... needed more pics, but I was being chased by the clock!) and I'm looking for a level neck.
Getting close! It's still lacking the bridge, tail piece and finger rest.
The bridge is done (to the left of the brush). I'm ready for the tailpiece with its' Sacony strap and an end plug for the strap to attach to. Later I'll install a 1/4" jack that accommodates both a Sacony strap and a player's shoulder strap).

Strings are on and I'm notching the ebony saddle/bridge. The ebony tail piece tends to pull the strings together and these small notches keep the stings in place.

Traditionally the bridge isn't attached to the top plate on an archtop. Rather it's adjustable. This puts the burden on the player to get it positioned right or the intonation will be off.

Andy tuning up!
We be happy campers! It was 10 straight days of 8-10 hours/day.
And here they are. Still missing the finger rest and it's mounting block as well as the ebony cover for the neck adjusting rod. We'll both be adding pickups later. And the backs need the binding scraped and a lot more sanding. But they're playable at this point.

 

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