[RodB]

I looked at the schematic and it doesn't have B+ voltages listed but some of the tube plate voltages are. The highest is 150 so I think 200 volts is your minimum for filter caps. You can get a better idea of the B+ by measuring the transformer secondary to the rectifier tube. The schematic lists the filter capacitance at 2 and 4 mfd. Therefore, the 4.7 @ 250 should work for replacing the 4. The 2.2 @ 100 volts is not high enough to handle the B+ of 200 V.