# GU81m - triode connected
# supressor grid connected to cathode
# screen grid connected to anode
#
# 2 min warm-up 
# filiment voltage 12.6
#
#
# Measured Data 
# grid voltage (V)	 plate voltage (V)	plate current (mA)
-59.4		 100   0
-59.4 		 200   12
-59.4		 300   117
-59.4 		 400   300
-59.4		 500   525

-50		 100   0
-50		 200   31
-50		 300   163
-50		 400   364
-50		 500   595

-40		 100   0.5
-40		 200   62
-40		 300   222
-40		 400   440
-40		 500   634

-30		 100   6
-30		 200   105
-30		 300   303
-30		 400   516
-30		 500   695

-20		 100   28
-20		 200   175
-20		 300   375
-20		 400   580
-20		 500   724

-10		 100   69
-10		 200   334
-10		 300   446
-10		 400   659
-10		 500   742

0		 0     4
0		 50    47
0		 100   124
0		 150   206
0		 200   309
0		 250   420
0		 300   519
0		 350   620
0		 400   714
0		 500   800