Jim, Sure the 47uf will work fine. See Angela at the link below. They have a good selection of capacitors at 600 volt and up to 1000 volts. Have fun and be careful when working on your amps. Also for more exotic caps Ron Welborne is having a sale. But if I am right these caps are quite big. I have no connection to Ron W' except that I own 2 pairs of his DRD amps. The angela caps should work fine for you. I have used the Sequa paper in oil caps in my Dynaco ST-70 amplifier with very good results. John C.