Sunhearth
Instruments- discuss specific features, luthiers, instrument problems & questions
Your Sunhearth dulcimer made by Walt Martin in Roaring Spring, PA is a great instrument. These instruments were originally meant to be in a 1 - 5 - 5 tuning (DAA or CGG primarily) and using a noter. You might have to lower the action a little if you choose to play chord/melody style. You should be able to tune up to DAd using 0.010 for the melody strings, a 0.013 for the middle, and 0.020 for the bass. If those are too floppy, you can increase to 0.11 or 0.012, 0.014, and 0.022. Increasing the size of the strings will increase the tension of the peg and if they are friction pegs you may have trouble keeping them in tune.
Ken
"The dulcimer sings a sweet song."

Ok, I'll consider myself duly advised!
