Hello, I have this breadboarded with the power supply like in the schematic. The last filter node supplies both the screen of the 6V6 and the plate load for the 6SJ7. It sounds fine this way and it's dead quite, but my screen voltage on the 6V6 is only 270v while the plate is at 324v. I'm using a smaller power transformer for this hence the lower voltages. I've also tried adding another filter node with a 1k resistor and 10uf cap to feed the screen and my screen voltage goes up to 317v. Is it better at the higher voltage or is running the screen on the low side for the 6V6 OK? I've also tried feeding the screen of the 6V6 from the 2nd filter node that goes to the OT, but I got a lot of hum that way. Any thoughts on which way is better?