Just watched your brand new video on dropping in a pair of 5AR4 rectifier tubes in and biasing them. In your previous video you showed the wiring to the recifier tubes with the resistor and diode tag stripped in. Without removing these, won't dropping in a pair of 5AR4 tubes still yield nothing as the diode is still there? You still effectively have that solid state diode don't you? Can't want to get further into this project as I have one I'm about to open up and see how mine is built.