I want to decrease hum in Power supply as much as possible on my Grundig 1088. What are stock values and what would some of you recommend putting in for minimum hum. I listen to it at night and any faint hum seems loud at that time.

:I want to decrease hum in Power supply as much as possible on my Grundig 1088. What are stock values and what would some of you recommend putting in values -wise for minimum hum. I listen to it at night and any faint hum seems loud at that time.

I should add that i think stock values are 50uF @ 350 - 400V