Amp-to-Pickup cord?
Instruments- discuss specific features, luthiers, instrument problems & questions
I don't know if the output jack on your dulcimer is on the end piece, but if it is, I like to use a right angle 1/4 inch plug at one end of the cable and a straight plug at the amp end. Here is a link to one I found at Amazon: http://www.amazon.com/KIRLIN-IWB-202BFGL-10-CA-10-Feet-Instrument/dp/B00Y4S67OM/ref=sr_1_5?s=digital-text&ie=UTF8&qid=1460511789&sr=8-5&keywords=guitar+cable
Like with anything else, you get what you pay for. Get the best quality cable you can afford to preserve the quality of your sound.
Ken
"The dulcimer sings a sweet song."
