Version 4
SHEET 1 880 680
WIRE 48 64 -144 64
WIRE 288 64 48 64
WIRE 368 80 144 80
WIRE 208 96 -64 96
WIRE 48 112 48 64
WIRE 288 112 288 64
WIRE -144 128 -144 64
WIRE 0 160 -16 160
WIRE 240 160 224 160
WIRE 144 176 144 80
WIRE 144 176 96 176
WIRE 368 176 368 80
WIRE 368 176 336 176
WIRE -64 192 -64 96
WIRE 0 192 -64 192
WIRE 144 192 144 176
WIRE 208 192 208 96
WIRE 240 192 208 192
WIRE -64 208 -64 192
WIRE 224 256 224 160
WIRE 256 256 256 240
WIRE 256 256 224 256
WIRE -144 304 -144 208
WIRE -64 304 -64 288
WIRE -64 304 -144 304
WIRE -16 304 -16 160
WIRE -16 304 -64 304
WIRE 16 304 16 240
WIRE 16 304 -16 304
WIRE 144 304 144 272
WIRE 144 304 16 304
WIRE 224 304 224 256
WIRE 224 304 144 304
WIRE 16 320 16 304
FLAG 16 320 0
SYMBOL voltage -144 112 R0
WINDOW 0 -16 57 Left 0
SYMATTR InstName Vp
SYMATTR Value 0
SYMBOL voltage -64 192 R0
WINDOW 0 -18 61 Left 0
SYMATTR InstName Vg1
SYMATTR Value 0
SYMBOL voltage 144 176 R0
WINDOW 0 -19 60 Left 0
SYMATTR InstName Vg2
SYMATTR Value 350
SYMBOL Valve\\Pentode 48 176 R0
WINDOW 0 -71 -61 Left 0
WINDOW 38 34 105 Center 0
SYMATTR InstName U1
SYMATTR SpiceModel EL34Pent
SYMBOL Valve\\Pentode 288 176 R0
WINDOW 0 -66 -63 Left 0
WINDOW 38 5 104 Center 0
SYMATTR InstName U2
SYMATTR SpiceModel 7591Pent
TEXT 40 320 Left 0 !.dc Vp 0 500 100 Vg1 0 -50 10