The ResoBridge T -
Replacement T bridge with intonation adjustment for Tri-cone resonator guitars
The ResoBridge T
The reasons for fitting a ResoBridge to a resonator guitar
In Brief (see our Tech. Info. page for more on this subject) -
All resonator guitars have fixed, straight string saddles. Any compensation for intonation must be built in to the guitar by choosing the distance set between the twelfth fret and the saddle and through setting the saddle at a slight angle to the strings. This does not allow for changes in string gauge or action and doesn't work well for open tunings, where the musical interval between the strings isn't as regular as standard tuning. The open tunings of C and D, often used for slide playing, require that the bottom string length should be significantly longer than the other strings.
Many vintage instruments and a lot of the Korean copies, have poor intonation because the distance between the twelfth fret and the saddle is too small.
The ResoBridge T has moveable saddles and allows near perfect intonation because you can set the individual string length, just like on many electric guitars. The range of saddle movement allows compensation both for the large offsets required by open tunings and for the dimension problems found in some vintage instruments and modern copies.