Peel the rhubarb and cut the stalk into 1/2-inch pieces.
Peel and core the apples, then grind with the raisins in a food chopper.
Combine all the ingredients in a large kettle and bring to a boil, stirring until the sugar is dissolved.
Reduce the heat and simmer, stirring frequently, for about 25 minutes or until thick.
Pack in hot sterilized jars and seal.