Version 4
SHEET 1 880 680
WIRE 48 80 -144 80
WIRE 304 80 48 80
WIRE 384 96 144 96
WIRE 208 112 -64 112
WIRE -144 128 -144 80
WIRE 48 128 48 80
WIRE 304 128 304 80
WIRE 144 176 144 96
WIRE 144 176 96 176
WIRE 384 176 384 96
WIRE 384 176 352 176
WIRE -64 192 -64 112
WIRE 0 192 -64 192
WIRE 144 192 144 176
WIRE 208 192 208 112
WIRE 256 192 208 192
WIRE -64 208 -64 192
WIRE -144 304 -144 208
WIRE -64 304 -64 288
WIRE -64 304 -144 304
WIRE 16 304 16 240
WIRE 16 304 -64 304
WIRE 144 304 144 272
WIRE 144 304 16 304
WIRE 272 304 272 240
WIRE 272 304 144 304
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
WINDOW 3 18 100 Left 0
SYMATTR InstName Vg2
SYMATTR Value 150
SYMBOL Valve\\Tetrode 48 176 R0
WINDOW 0 33 -48 Left 0
WINDOW 38 16 77 Center 0
SYMATTR InstName U1
SYMATTR SpiceModel 6DQ6A
SYMBOL Valve\\Tetrode 304 176 R0
WINDOW 38 13 78 Center 0
SYMATTR InstName U2
SYMATTR SpiceModel 6DQ6B
TEXT 48 320 Left 0 !.dc Vp 0 500 50 Vg1 0 -40 5