Looks like the 150V knee is at 770 mA and 70V. 1900/4 Ohms would take that down to 0 mA at 366V+70V = 436V. Then maybe 70 mA of idle current and 1900/2 Ohms for the class A region would roughly cover the 436V to 500V region.
Peak Watts around 240V and 440 mA for 100 Watts peak. Average would be less than 1/2 that, so under 50 Watt. Idle power .07 x 500V = 35 Watts, a bit hot. All roughly calculated, no straight edges.
Max signal between 70 mA and 770 mA for 1/2 of time. Or 440 mA avg for 1/2 time, 220 mA. That pushes the 200 mA max DC rating of the cathode.
This tube has a high 50 Watt rating, but only a 200 mA max DC rating. Might want to cool this off a little, for longer life, like maybe 2200 Ohm to 2500 Ohm P to P OT, 140V Vg2, and 50 to 60 mA idle. Just estimating. Suggest re-plot the details.
Peak Watts around 240V and 440 mA for 100 Watts peak. Average would be less than 1/2 that, so under 50 Watt. Idle power .07 x 500V = 35 Watts, a bit hot. All roughly calculated, no straight edges.
Max signal between 70 mA and 770 mA for 1/2 of time. Or 440 mA avg for 1/2 time, 220 mA. That pushes the 200 mA max DC rating of the cathode.
This tube has a high 50 Watt rating, but only a 200 mA max DC rating. Might want to cool this off a little, for longer life, like maybe 2200 Ohm to 2500 Ohm P to P OT, 140V Vg2, and 50 to 60 mA idle. Just estimating. Suggest re-plot the details.
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