Try these schematic, 45, can replace OT 5k:8 to 5k:5k to drive 300b
Free lunch or Monkey:
My New 45 SET (choke-loaded 6SN7, direct-coupled)
And:
6SN7 or similar as input, 45 as driver, and 300B as power tube
Free lunch or Monkey:
My New 45 SET (choke-loaded 6SN7, direct-coupled)
And:
6SN7 or similar as input, 45 as driver, and 300B as power tube