AB1 6L6 Amplifier

[grungefan91]

I'm trying to build my first AB1 amplifier and I'm trying to figure out the gain of the push-pull stage. I have the data sheet and am trying to figure out the gain from the curves, but there is no curve for 270 volts of screen voltage, just for triode operation and 250 Volts. I am doing the option of AB1 that yields 26.5 Watts. Here is the datasheet. Can someone please help me find the gain? I would greatly appreciate the help

http://pdf1.alldatasheet.com/datasheet- ... L6-GC.html