Posted on July 1, 2024July 9, 2024 by Dale Phillips Questions: Instrument Plan #39 Questions: Instrument Plan #39 by Deb Suran Originally published in American Lutherie #101, 2010 Remco Busink from the Netherlands asks: Two months ago I ordered GAL Instrument Plan #39 of the hammered dulcimer. The instrument is almost finished and I need to know what the numbers are in the string gauge table. Plan author Deb Suran of Deer Isle, Maine responds: The numbers are W&M music wire gauges. I would suggest purchasing plated music wire from a supplier to the music trades (piano / harpsichord / dulcimer strings), and not from a hardware store or industrial supplier. Hardware store wire is oiled, not plated, and will rust.