3000 v to gnd by 1ohm??
sounds a little broken. I think that tube had a flash over and died.
How could, 3000V+, be connected to chassis??
please be more clear, this is starting to sound like it can kill you.
Do you mean the helix supply, or the actual helix itself? (as in, the work coil), which I would say RFin to GND and RFout to GND since all the literature calls the helix the plate.
So you are calling the helix voltage the cathode voltage, the helix the helix, ? so its cathode supply now?
so anode, cathode, actual helix assembly. fucking boiler plate