Portland Guitar Co.

Designing and Building
Custom Handcrafted
Guitars, Ukuleles
and Accessories


Portland Guitar Co. | Portland Oregon | Contact Jay Dickinson-503.245.3276 | jay@portlandguitar.com


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Engineered Braces | Tilt Action Neck | Split Saddle Bridge | Split Saddle Nut

 

Portland Guitar Pretty Good Intonation (PGPG) System

Short Version | Introduction | Intonation Errors | Analysis | PG Approach | Comparisons | Conclusion


Finished Build

The Sunflower Guitar
Orchestral Model OM 1.7.26


15" Lower Bout Walnut Body,
Engelmann Spruce Top,
Ebony Fretboard
User Adjustable Tilt Action Mahogany Neck,
24.625" Scale Length
Ivoroid Binding
Blue Stained Maple Burl Appointments

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(50) June 9, 2009
I use these templates to draw the shapes of the braces on the quarters awn spruce.

(51) June 9, 2009
The brace blanks are laid out for inspection.

(52) June 9, 2009
Each brace blank has the bottom edge sanded so it fits the form perfectly.

(53) June 9, 2009
The holes are then drilled into the brace blanks.

(54) June 9, 2009
Lots of holes.

(55) June 9, 2009
I use the router table with a rasp bit to shape the brace blank into the shape of an I-beam.

(56) June 9, 2009
Cool  art picture of  a finished brace.

(57) June 9, 2009
Cool  art picture of  a finished brace.

(58) June 9, 2009
Cool  art picture of  a finished brace.

(59) June 9, 2009
Cool  art picture of  a finished brace.

(60) June 9, 2009
Cool  art picture of  a finished brace.

(61) June 9, 2009
Cool  art picture of  a finished brace.

(62) June 9, 2009
Cool  art picture of  a finished brace.

(63) June 9, 2009
Now I dimension the back plate to 100 mills thickness using the drum sander.

(64) June 9, 2009
I use the band saw to cut out the back plate.  I over size the back plate by about 1/4 inch so I have a little margin when the back gets glued on to the sides.

(65) June 9, 2009
The back plate cut out.

(66) June 9, 2009
I use a go box and sticks to force the brace and the back plate into the back form.

(67) June 9, 2009
I use lots of go sticks to make sure that the braces are firmly glued into place.

(68) June 9, 2009
A look at the back with the braces glued in place.  The contra-rosette and the center brace will be glued in later.

(69) June 9, 2009
The rosette will have a center circle made from this burled maple.

(70) June 9, 2009
The pieces I will use for the rosette and contra-rosette.

(71) June 9, 2009
I use this circle cutting tool and the Dremel tool to cut a channel for the rosette ring.

(72) June 9, 2009
After the rosette ring is glued in place I sand it flush to the top.

(73) June 9, 2009
A close up of the rosette ring.

(74) June 9, 2009
Now I use the circle cutter to route a channel for the purfling strip.

(75) June 9, 2009
Here I am gluing in the purfling.

(76) June 9, 2009
After the purfling is glued in I sand everything flush with the top.

(77) June 9, 2009
And once again I use the circle cutter to cut out the sound hole.

(78) June 9, 2009
Here I am laying out the top braces for inspection.

(79) June 9, 2009
The cross braces have a slot cut into them on the band saw.

(80) June 9, 2009
A look  at the cross brace intersection.

(81) June 9, 2009
And here I am laying out the top braces getting ready to trim them to match the sides.