im looking at the plate characteristics data sheet for the 6SJ7. the one that has the plate current on the left and screen current on the right. i figured the gain i wanted by using a 60k resistor, 1650 umhos came out to 99. when i drew the load line, 295 B+, and guesstimating a cathode resistor of 1.5k, it came out to about 4.45ma. but im REALLY not understanding how to read the grid voltage curves against my load line. so i cant figure out how to draw my cathode load line. and with the screen current on the right... how does that play into the lines?