Your final 801A amp schematic indicates the grid voltage of the 801A as -18.25 VDC. How can this be an A2 output stage?
At low power, it is in class A(1). When driven harder, it will go into class A2 and grid current starts to flow. Hope this is clear. :)
Join in and write your own page! It's easy to do. How? Simply click here to return to DIY Amplifier - 1.