Version 4
SHEET 1 880 680
WIRE 224 -96 224 -128
WIRE 352 -96 224 -96
WIRE 224 -64 224 -96
WIRE 224 48 224 16
WIRE 272 48 224 48
WIRE 448 48 336 48
WIRE 352 64 352 -96
WIRE -288 96 -288 16
WIRE 224 112 224 48
WIRE 352 160 352 144
WIRE 352 160 272 160
WIRE -64 176 -128 176
WIRE 80 176 0 176
WIRE 176 176 80 176
WIRE 352 176 352 160
WIRE -128 192 -128 176
WIRE -288 256 -288 176
WIRE 192 256 192 224
WIRE 272 256 192 256
WIRE -128 304 -128 272
WIRE 80 304 80 176
WIRE 192 304 192 256
WIRE 272 304 272 256
WIRE -128 416 -128 384
WIRE 80 416 80 384
WIRE 192 416 192 384
WIRE 272 416 272 368
WIRE 352 416 352 256
FLAG 224 -128 A
IOPIN 224 -128 In
FLAG -288 256 0
FLAG -128 416 0
FLAG 80 416 0
FLAG 192 416 0
FLAG 272 416 0
FLAG -288 16 A
IOPIN -288 16 Out
FLAG 352 416 0
FLAG 448 48 Out
SYMBOL res 176 288 R0
SYMATTR InstName R1
SYMATTR Value 500
SYMBOL res 64 288 R0
SYMATTR InstName R2
SYMATTR Value 470k
SYMBOL res -144 176 R0
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL res 208 -80 R0
SYMATTR InstName R4
SYMATTR Value 37.5k
SYMBOL voltage -128 288 R0
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value SINE(0 1 1k)
SYMATTR Value2 AC 1
SYMBOL voltage -288 80 R0
SYMATTR InstName V2
SYMATTR Value 280
SYMBOL cap 256 304 R0
SYMATTR InstName C1
SYMATTR Value 100µ
SYMBOL cap 336 32 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 220n
SYMBOL cap 0 160 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 220n
SYMBOL Misc\\tetrode 224 160 R0
SYMATTR InstName U1
SYMATTR Value JJEF806S
SYMBOL res 336 48 R0
SYMATTR InstName R5
SYMATTR Value 30k
SYMBOL res 336 160 R0
SYMATTR InstName R6
SYMATTR Value 50k
TEXT -208 -128 Left 2 !.INC Koren_Tubes.inc
TEXT -208 -96 Left 2 !.tran 0 1 990m
TEXT -208 -64 Left 2 !;ac oct 1000 10 22k