use a lean well cured ham.
trim off all fat.
since the ham in the store you buy is already cooked, you can dehydrate it as is. [make sure it says cooked on it].
however further ciooking at home will make it more tender.
cut ham in to 1/4 inch squares, or very thin slices. and spread one layer deep on the dehydrator trays.
dry at 145 degrees for about 4 hours, then reduce temp to 130 degrees, and dry until hard and dried thoughout. during drying stirr the pieces very once in a while.

to use your dried ham cubes, use 1 cup of ham and one cup of boiling water in a sauce pan. cover and cook on low heat for about one hour. use ham in cabbage soups, or bean soup, or in green beans, any thing really.