Version 4
SHEET 1 880 680
WIRE 416 -240 240 -240
WIRE 720 -240 416 -240
WIRE 240 -176 240 -240
WIRE 416 -112 416 -240
WIRE 240 0 240 -96
WIRE 416 48 416 -32
WIRE 416 48 304 48
WIRE 240 192 240 96
WIRE 720 208 720 -240
WIRE 16 240 -112 240
WIRE 192 240 96 240
WIRE 208 352 208 288
WIRE -112 368 -112 240
WIRE -112 512 -112 448
WIRE 208 512 208 432
WIRE 208 512 -112 512
WIRE 720 512 720 288
WIRE 720 512 208 512
WIRE 208 576 208 512
FLAG 208 576 0
SYMBOL Misc\\triode 240 240 R0
SYMATTR InstName U1
SYMATTR Value ECC82
SYMBOL Misc\\EuropeanResistor 192 336 R0
SYMATTR InstName R1
SYMATTR Value 2K2
SYMBOL Misc\\EuropeanResistor 112 224 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10K
SYMBOL Misc\\EuropeanResistor 224 -192 R0
SYMATTR InstName R3
SYMATTR Value 3K3
SYMBOL pnp 304 96 R180
SYMATTR InstName Q1
SYMATTR Value BC557C
SYMBOL voltage 416 -128 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 1.7
SYMBOL voltage 720 192 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 33
SYMBOL voltage -112 352 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value SINE(0 0.2 1K)
TEXT -200 560 Left 2 !.inc koren_tubes.cir
TEXT -200 584 Left 2 !.tran 0 10m 2m 50µ