TD's Resonator (GHR-1)

[Trevor Davies]

I have had another look at the ability to adjust the string length for intonation. The bridge/spider/cone have the ability to be moved on the cone ledge, and rotated, to give the shorter high e string length and longer Low E string length.

As mentioned earlier, the distance from the back of the nut to the 12th fret is about 322 mm. For the D string, since it is less affected by rotation of the bridge, I can get a range of lengths from about 646 mm to 650 mm (without any rotation of the bridge). I think that is a good range.

My electric guitar with a similar nut to 12 th fret length has the D string intonated at 648 mm. I know that different strings will require different intonation lengths.

[fender3x]

I have had another look at the ability to adjust the string length for intonation. The bridge/spider/cone have the ability to be moved on the cone ledge, and rotated, to give the shorter high e string length and longer Low E string length.

As mentioned earlier, the distance from the back of the nut to the 12th fret is about 322 mm. For the D string, since it is less affected by rotation of the bridge, I can get a range of lengths from about 646 mm to 650 mm (without any rotation of the bridge). I think that is a good range.

My electric guitar with a similar nut to 12 th fret length has the D string intonated at 648 mm. I know that different strings will require different intonation lengths.

I get why you are measuring the D string...although the measurements are making me scratch my head. Usually the lengths are either "Fender" or "Gibson." 25.5" or 24.75" respectively. Your measurement is closest to standard Fender (which is what my acoustic is). It should be between 324 adn 325 mm to he middle of the 12th fret.

If it is Fender spec, your high E should intonate at about exactly 650mm...so if the D is also at 650mm it would most likely intonate longer than that. How sure are you about your measurements? I'd get out my measuring stick if I were home to see how much variance there is on my F and G necks...but I am actually South of you for a few days on a business trip to Chile... (apropos of nothing, but I wanted to get it in there).

It may not matter too much. The physics of string intonation is so opaque to me that I tend to think strings intonate where ever they feel like it...and Lots of acoustics have straight bridges or slants based on guesses.