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

Classical Model Sympitar Cutaway

CLSyC 2.1.67

  • Body: Flamed Walnut
  • Top: Sitka Spruce
  • Neck: Mahogany
  • Fretboard: Ebony

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( 308 ) March 31-2016

I set up my spray booth and use a special pedestal to hold and rotate the body while I spray it.

( 309 ) March 31-2016

After the lacquer has set and cured to some degree I polish it to a high luster.

( 310 ) March 31-2016

After cleaning out the holes I install the tuning machines.

( 311 ) March 31-2016

This is the sub-nut for the sympathetic strings.

( 312 ) March 31-2016

The standard nut sits on top of the sub-nut

( 313 ) March 31-2016

And at this point I sand the sub-bridge flush to the top.

( 314 ) March 31-2016

The underside of the bridge is hollowed out to accommodate the sym-strings. It is critical that the top of the guitar and the bridge for the sym-strings are completely isolated from each other. If they touch, the top will stop vibrating... don't want that.

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( 316 ) March 31-2016

Eventuallly, we will have to open up this slot to accommodate the flex in the top when the strings are installed.

( 317 ) March 31-2016

Now I can finish shaping the bridge.

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( 319 ) March 31-2016

After I finishing the bridge I test it for fit.

( 320 ) March 31-2016

I tape off the bridge area and set the position of the bridge.

( 321 ) March 31-2016

And then I score the top around the perimeter of the bridge with an exacto knife.

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( 323 ) March 31-2016

Next I scrape away the finish inside the scored perimeter, leaving clean wood to glue the bridge to.

( 324 ) March 31-2016

A bit of glue and a few special clamps sets the bridge in place.

( 325 ) March 31-2016

I use my milling machine and a diamond blade to score the position of the strings on the nut.

( 326 ) March 31-2016

And after a bit of work I have everything set up.

( 327 ) March 31-2016

There will be a period of "dialing in the system" as this is a rather complex instrument.

( 328 ) March 31-2016

Ben giving it its first test ride.

( 329 ) March 31-2016