For those who are curious, please take a look at the photo from 6moons.com:
https://6moons.com/audioreviews/musicreference/hero_open.jpg
Those two 33uf 350v capacitors are smoothing/filtering purpose, you can clearly see it connected to a 1kohm resistor go to the output tube screen grid.
https://6moons.com/audioreviews/musicreference/hero_open.jpg
Those two 33uf 350v capacitors are smoothing/filtering purpose, you can clearly see it connected to a 1kohm resistor go to the output tube screen grid.