Lou,
I am tuning it to keep the grid current at 500 mA or less. The white area tops at 500 mA so that is what I have been referencing. This is a very touchy tank circuit! The amp came with some pencil marks (!) for reference when tuning so I used them. The final tune points are not off from those marks by much at all. I don't plan on running anything over 600 watts to help preserve the tubes as much as possible. I guess the only meter function that is relevant is the HV.? :)
Thanks for the insight.
Warren / NI5L
