Story and Clarke Piano sound board ready to cut into guitar tops

Story and Clarke Piano sound board ready to cut into guitar tops

These tops start like this after the piano is disassembled. This piano, according to the serial number was produced in the year 1911. The sound board was made from red spruce of varying grain widths. The issues I face with this type of material are that the boards used during original construction (of these pianos) were sometimes off the quarter and always three to four inches wide. Run out is not really considered and the sound board on the whole is about 8mm thick. On the other hand, this is well seasoned red spruce. I have made three guitars with this material and the sound quality has been great. 

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 Rib frame mold with cut-away insert

Rib frame mold with cut-away insert

Altering the Guitar Mold

The guitar that I am building here is loosely based on a Gibson L-1, 0, or 00. I have made five of these before and have been quite satisfied with the look, sound and playability. These two guitars are going to be cut-away types so I have had to alter the rib frame mold. A piece of thick oak, a dowel, a thread box and matching tap and this is what I came up with.