Version 4
SHEET 1 1676 680
WIRE 16 -1552 -128 -1552
WIRE -128 -1536 -128 -1552
WIRE -128 -1440 -128 -1456
WIRE 16 -1424 16 -1552
WIRE 96 -1376 64 -1376
WIRE 208 -1376 176 -1376
WIRE -32 -1360 -128 -1360
WIRE 208 -1344 208 -1376
WIRE -128 -1328 -128 -1360
WIRE -128 -1232 -128 -1248
WIRE -16 -1232 -16 -1312
WIRE 208 -1232 208 -1264
FLAG -128 -1440 0
FLAG -128 -1232 0
FLAG -16 -1232 0
FLAG 208 -1232 0
SYMBOL voltage -128 -1552 R0
WINDOW 3 24 44 Invisible 2
SYMATTR Value ""
SYMATTR InstName V1
SYMBOL voltage -128 -1344 R0
WINDOW 3 28 105 Invisible 2
SYMATTR Value ""
SYMATTR InstName V2
SYMBOL Misc\\tetrode 16 -1376 R0
SYMATTR InstName U1
SYMATTR Value EL34N
SYMBOL voltage 208 -1360 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 300
SYMBOL Misc\\EuropeanResistor 192 -1392 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1000
TEXT 40 -1536 Left 2 !.dc v1 0 200 1 v2 -36 0 4
TEXT 40 -1488 Left 2 !.inc Tubes.cir