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 -144 272 -144 208
WIRE -112 272 -144 272
WIRE -112 288 -112 272
WIRE -144 304 -144 272
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 224 304 224 160
WIRE 224 304 144 304
WIRE 256 304 256 240
WIRE 256 304 224 304
FLAG -112 288 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 0
SYMBOL Valve\\Pentode 48 176 R0
WINDOW 0 -69 -63 Left 0
WINDOW 38 34 102 Center 0
SYMATTR InstName U1
SYMATTR SpiceModel EL34Pent
SYMBOL Valve\\Pentode 288 176 R0
WINDOW 0 -69 -63 Left 0
WINDOW 38 23 102 Center 0
SYMATTR InstName U2
SYMATTR SpiceModel 7591Pent
TEXT -144 320 Left 0 !.dc Vp 0 500 100 Vg2 50 450 50