Version 4
SHEET 1 880 680
WIRE 144 -128 -16 -128
WIRE -16 -96 -16 -128
WIRE 144 -96 144 -128
WIRE -16 16 -16 -16
WIRE 144 32 144 -16
WIRE 240 32 144 32
WIRE 288 32 240 32
WIRE 240 64 240 32
WIRE 144 112 144 32
WIRE 240 176 240 144
WIRE 240 176 192 176
WIRE -144 192 -240 192
WIRE -16 192 -80 192
WIRE 96 192 -16 192
WIRE 112 288 112 240
WIRE 192 288 112 288
WIRE -240 320 -240 192
WIRE -16 320 -16 192
WIRE 112 320 112 288
WIRE 192 320 192 288
WIRE -240 432 -240 400
WIRE -16 432 -16 400
WIRE 112 432 112 400
WIRE 192 432 192 384
FLAG 112 432 0
FLAG 192 432 0
FLAG -16 432 0
FLAG -16 16 0
FLAG -240 432 0
FLAG 288 32 out1
FLAG -240 192 in
SYMBOL voltage -16 -112 R0
SYMATTR InstName V1
SYMATTR Value 400
SYMBOL Misc\\EuropeanResistor 96 304 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL polcap 176 320 R0
SYMATTR InstName C1
SYMATTR Value 100u
SYMBOL Misc\\EuropeanResistor -32 304 R0
SYMATTR InstName R2
SYMATTR Value 1Meg
SYMBOL Misc\\EuropeanResistor 128 -112 R0
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL voltage -240 304 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value SINE(0 1 1k)
SYMBOL cap -144 208 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C2
SYMATTR Value 1u
SYMBOL Misc\\EuropeanResistor 224 48 R0
SYMATTR InstName R4
SYMATTR Value 500
SYMBOL pentode4 144 176 R0
SYMATTR InstName U1
SYMATTR Value EL509
TEXT -280 -232 Left 2 !.tran 10m
TEXT -280 -208 Left 2 !.options plotwinsize=0
TEXT 56 -240 Left 2 !.inc EL509.sub