While asking some questions regarding my 6LU8 build, someone posted a link to the schematic from your web site. The one I used to build my 6LU8.
Anyway, someone pointed out that in your schematic the 2.7k resistor should come AFTER the 510k resistor.
Now, I have no idea which would or would not be correct, but I went ahead and reviewd your 6BM8 schematic, and the connections from triode plate to pentode grid is different, There the 1k resistor is connected AFTER the 470k.
I also reviewed several other single ended schematics, and they all have the grid resistor right before the grid, and the large resistor to ground is BEFORE the small one.
I just would like for you or someone else who can help me here to let me know the correct way to wire this interstage.