[drakelist] R4C hum

[AD3G]

Hello list...I recently acquired a nice R4C,but it has some issues...I powered up slowly on a variac,but the filter caps were hopelessly shot. I replaced with a Sherwood filter cap kit.I have far less hum,but it's still there,just not as bad(I can hear reciever hiss now). Would a power supply mod be in order,(Sherwood)or should I just change out the caps on the p/s board? I'm new to Drake gear and wanted to see what the general consensus of the Drake gang would be.  I plan on keeping the R4C for a while,so I want to do it right the first time.               73  Paul