circuit board layout from a schematic

[Bushbaby]

I've looked at this and must be completely thick as I cannot understand how to calculate the load line!! I did look at https://www.ampbooks.com/mobile/vacuum-tubes/ to calculate the load line but it hasnt helped.

Rob

[pwdrive]

The calculator in that link don't look right to me unless I'm missing something, the grid voltage in the box doesn't compute with the operating point on the graph.

Lawrence.