Version 4
SHEET 1 1336 704
WIRE 976 -224 768 -224
WIRE 976 -176 976 -224
WIRE 1088 -176 976 -176
WIRE 768 -160 768 -224
WIRE 976 -128 976 -176
WIRE 1088 -128 1088 -176
WIRE 352 -112 288 -112
WIRE 576 -112 432 -112
WIRE 640 -112 576 -112
WIRE 720 -112 640 -112
WIRE 288 -16 288 -112
WIRE 352 -16 288 -16
WIRE 976 -16 976 -48
WIRE 976 -16 432 -16
WIRE 1088 -16 1088 -48
WIRE 1088 -16 976 -16
WIRE 560 16 496 16
WIRE 656 16 560 16
WIRE 736 16 736 -64
WIRE 736 16 656 16
WIRE 576 64 576 -112
WIRE 736 64 736 16
WIRE 496 112 496 16
WIRE 288 128 288 -16
WIRE 320 128 288 128
WIRE 560 160 560 16
WIRE 560 160 544 160
WIRE 384 176 384 128
WIRE 448 176 384 176
WIRE 288 192 288 128
WIRE 32 240 0 240
WIRE 240 240 112 240
WIRE 464 256 464 224
WIRE 576 256 576 144
WIRE 576 256 464 256
WIRE 384 272 384 176
WIRE 256 320 256 288
WIRE 656 320 656 16
WIRE 256 336 256 320
WIRE 256 336 176 336
WIRE 976 336 976 -16
WIRE 0 368 0 240
WIRE 256 368 256 336
WIRE 576 368 576 256
WIRE 176 400 176 336
WIRE 0 480 0 448
WIRE 176 480 176 464
WIRE 176 480 0 480
WIRE 256 480 256 448
WIRE 256 480 176 480
WIRE 384 480 384 352
WIRE 384 480 256 480
WIRE 576 480 576 448
WIRE 576 480 384 480
WIRE 656 480 656 384
WIRE 656 480 576 480
WIRE 736 480 736 144
WIRE 736 480 656 480
WIRE 976 480 976 416
WIRE 976 480 736 480
WIRE 976 544 976 480
FLAG 976 544 0
FLAG 288 128 a
FLAG 256 320 k
FLAG 640 -112 g845
SYMBOL voltage 976 320 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 850
SYMBOL Misc\\EuropeanResistor 240 352 R0
SYMATTR InstName R1
SYMATTR Value 2.2K
SYMBOL cap 160 400 R0
SYMATTR InstName C3
SYMATTR Value 22µ
SYMBOL voltage 0 352 R0
WINDOW 3 -4 190 Left 2
WINDOW 123 -5 223 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value SINE(0 1 440)
SYMATTR Value2 AC 1
SYMATTR InstName V2
SYMBOL Misc\\triode 768 -112 R0
SYMATTR InstName U3
SYMATTR Value 845
SYMBOL Misc\\EuropeanResistor 720 48 R0
SYMATTR InstName R6
SYMATTR Value 1.2K
SYMBOL ind 960 -144 R0
SYMATTR InstName L1
SYMATTR Value 50
SYMBOL res 1072 -144 R0
SYMATTR InstName 3K
SYMATTR Value 3.5K
SYMBOL cap 320 144 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C4
SYMATTR Value 47n
SYMBOL cap 640 320 R0
SYMATTR InstName C5
SYMATTR Value 220µ
SYMBOL Misc\\EuropeanResistor 128 224 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 22K
SYMBOL ind2 560 352 R0
SYMATTR InstName L2
SYMATTR Value 20
SYMATTR Type ind
SYMATTR SpiceLine Rser=100
SYMBOL ind2 560 48 R0
SYMATTR InstName L3
SYMATTR Value 20
SYMATTR Type ind
SYMATTR SpiceLine Rser=220
SYMBOL Misc\\triode 288 240 R0
SYMATTR InstName U1
SYMATTR Value ECC81
SYMBOL Misc\\EuropeanResistor 448 -32 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 470K
SYMBOL Misc\\EuropeanResistor 448 -128 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 470K
SYMBOL Misc\\EuropeanResistor 368 256 R0
SYMATTR InstName R7
SYMATTR Value 1e6
SYMBOL Misc\\tetrode 496 160 R0
SYMATTR InstName U2
SYMATTR Value EL84
TEXT 632 544 Left 2 !.inc Koren_Tubes.cir
TEXT 256 584 Left 2 !.tran 0 1 980m
TEXT 344 -200 Left 2 !K1 L2 L3 1
TEXT 256 544 Left 2 !*ac dec 100 10 100K
TEXT 520 504 Left 2 ;Rser=100R