storing an instrument
Instruments- discuss specific features, luthiers, instrument problems & questions
You can make a stable, playable dulcimer which is only a stick. You just won't hear much without adding a sound box or putting it on a table top resonator.
The cardboard dulcimers are a good example. The structure is usually a piece of 1x2 lumber with a modest strum-hole. Once tuned and settled in, the cardboard dulcimers will often hold relative tuning for months when stored in a cloth bag, and only need a touch-up when string tension is affected by room temperature changes.
I'm not a fan of hollowed out fret boards, etc. I'm not convinced they can be proven to make better music. When I build, I like the basic stick and box construction. I think pear and hour glass box shapes, fancy woods, lots of sound holes, etc.are mostly decorative.Box size does definitely affect the sound produced.
Decoration is fine, but should be seen as such. I put ebony or mother-of-pearl dots on my simple sticks and prefer trapezoidal boxes with shaped holes to rectangles with round holes. Sometimes I paint folkish designs on the boxes.
I can appreciate fancy dulcimers just as I can appreciate an Aston-Martin car - but I drive a basic small car and enjoy playing "cheap" instruments.