Version 4
SHEET 1 1212 832
WIRE 208 -336 -32 -336
WIRE 384 -336 208 -336
WIRE 480 -336 384 -336
WIRE 208 -304 208 -336
WIRE 480 -256 480 -336
WIRE -32 -176 -32 -336
WIRE 208 -176 208 -224
WIRE 480 -112 480 -176
WIRE 480 -112 112 -112
WIRE 720 -112 480 -112
WIRE 880 -112 784 -112
WIRE 960 -112 880 -112
WIRE 480 -64 480 -112
WIRE -32 -16 -32 -96
WIRE 432 -16 -32 -16
WIRE 112 32 112 -112
WIRE -32 144 -32 -16
WIRE 448 144 448 32
WIRE 448 144 304 144
WIRE 544 144 448 144
WIRE 688 144 608 144
WIRE -272 192 -320 192
WIRE -80 192 -272 192
WIRE 112 208 112 112
WIRE 304 208 304 144
WIRE 448 240 448 144
WIRE -64 336 -64 240
WIRE 112 336 112 272
WIRE 112 336 -64 336
WIRE -320 352 -320 192
WIRE -64 384 -64 336
WIRE 304 384 304 272
WIRE 688 384 688 144
WIRE 960 384 960 -112
WIRE -320 592 -320 432
WIRE -64 592 -64 464
WIRE -64 592 -320 592
WIRE 304 592 304 464
WIRE 304 592 -64 592
WIRE 448 592 448 320
WIRE 448 592 304 592
WIRE 688 592 688 464
WIRE 688 592 448 592
WIRE 960 592 960 464
WIRE 960 592 688 592
WIRE -64 640 -64 592
FLAG -64 640 0
FLAG 208 -176 0
FLAG 384 -336 +235VDC
FLAG 880 -112 out_non_inv
FLAG 688 144 out_inv
FLAG -272 192 200mVpp
SYMBOL Misc\\triode -32 192 R0
SYMATTR InstName U1
SYMATTR Value 12AU7
SYMBOL Misc\\triode 480 -16 R0
SYMATTR InstName U2
SYMATTR Value 12AU7
SYMBOL Misc\\EuropeanResistor -48 -192 R0
SYMATTR InstName R1
SYMATTR Value 220K
SYMBOL Misc\\EuropeanResistor 464 -272 R0
SYMATTR InstName R2
SYMATTR Value 22K
SYMBOL Misc\\EuropeanResistor 432 224 R0
SYMATTR InstName R3
SYMATTR Value 22K
SYMBOL Misc\\EuropeanResistor 288 368 R0
SYMATTR InstName R4
SYMATTR Value 47K
SYMBOL Misc\\EuropeanResistor -80 368 R0
SYMATTR InstName R5
SYMATTR Value 4700
SYMBOL voltage 208 -320 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 44 Left 2
SYMATTR InstName V1
SYMATTR Value 235
SYMBOL voltage -320 336 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value SINE(0 0.1 1K)
SYMBOL cap 288 208 R0
SYMATTR InstName C1
SYMATTR Value 1µ
SYMBOL cap 96 208 R0
SYMATTR InstName C2
SYMATTR Value 1µ
SYMBOL Misc\\EuropeanResistor 96 16 R0
SYMATTR InstName R6
SYMATTR Value 47k
SYMBOL Misc\\EuropeanResistor 672 368 R0
SYMATTR InstName R7
SYMATTR Value 32K
SYMBOL Misc\\EuropeanResistor 944 368 R0
SYMATTR InstName R8
SYMATTR Value 32K
SYMBOL cap 608 128 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 1µ
SYMBOL cap 784 -128 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value 1µ
TEXT -304 720 Left 2 !.INC Koren_Tubes.cir
TEXT -304 752 Left 2 !.tran 0 10m 0 1u
TEXT -304 816 Left 2 !.four 1k V(out_non_inv)
TEXT -304 784 Left 2 !.options plotwinsize=0
TEXT 8 784 Left 2 ;THD result:\nView -> SPICE Error Log