Version 4
SHEET 1 1220 776
WIRE 336 -224 256 -224
WIRE 432 -224 416 -224
WIRE 464 -224 432 -224
WIRE 576 -224 544 -224
WIRE 256 -192 256 -224
WIRE 64 -144 0 -144
WIRE 208 -144 64 -144
WIRE 352 -112 320 -112
WIRE 576 -112 576 -224
WIRE 576 -112 352 -112
WIRE 896 -112 576 -112
WIRE 1072 -112 896 -112
WIRE 1136 -112 1072 -112
WIRE 432 -80 432 -224
WIRE 896 -64 896 -112
WIRE 272 32 272 -96
WIRE 320 32 272 32
WIRE 432 32 432 0
WIRE 432 32 320 32
WIRE 896 80 896 16
WIRE 272 96 272 32
WIRE 0 112 0 -144
WIRE 704 144 320 144
WIRE 1136 176 1136 -112
WIRE 704 192 704 144
WIRE 896 192 896 160
WIRE 896 192 704 192
WIRE 896 240 896 192
WIRE 304 256 304 192
WIRE 352 256 304 256
WIRE 400 256 352 256
WIRE 544 256 480 256
WIRE 800 256 544 256
WIRE 304 272 304 256
WIRE 544 320 544 256
WIRE 800 368 800 256
WIRE 896 368 896 320
WIRE 896 368 800 368
WIRE 0 432 0 192
WIRE 304 432 304 352
WIRE 304 432 0 432
WIRE 544 432 544 400
WIRE 544 432 304 432
WIRE 1136 432 1136 256
WIRE 1136 432 544 432
WIRE 304 448 304 432
FLAG 64 -144 450VDC
FLAG 304 448 0
FLAG 1072 -112 U_out
FLAG 320 32 g1EL
FLAG 352 -112 kEL
FLAG 352 256 kEF
SYMBOL Misc\\tetrode 256 -144 R270
WINDOW 3 -78 -105 VRight 2
WINDOW 0 24 -79 VRight 2
SYMATTR Value EL34
SYMATTR InstName U2
SYMBOL voltage 0 96 R0
WINDOW 0 -63 6 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 500
SYMBOL Misc\\EuropeanResistor 416 -96 R0
SYMATTR InstName R1
SYMATTR Value 4.7Meg
SYMBOL Misc\\EuropeanResistor 288 256 R0
SYMATTR InstName R2
SYMATTR Value 47K
SYMBOL Misc\\EuropeanResistor 496 240 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 36 53 VTop 2
SYMATTR InstName R3
SYMATTR Value 82K
SYMBOL voltage 544 416 R180
WINDOW 0 24 96 Left 2
WINDOW 3 24 16 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 150
SYMBOL Misc\\EuropeanResistor 880 64 R0
SYMATTR InstName R4
SYMATTR Value {RP}
SYMBOL Misc\\EuropeanResistor 880 224 R0
WINDOW 3 26 76 Left 2
SYMATTR Value 560K
SYMATTR InstName R5
SYMBOL res 1120 160 R0
SYMATTR InstName R8
SYMATTR Value 10K
SYMBOL voltage 448 -224 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 -32 56 VBottom 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 100
SYMBOL Misc\\EuropeanResistor 432 -240 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 6K8
SYMBOL Misc\\triode 272 144 M0
SYMATTR InstName U1
SYMATTR Value 12AX7
SYMBOL Misc\\EuropeanResistor 880 -80 R0
SYMATTR InstName R6
SYMATTR Value 330K
TEXT -96 672 Left 2 !.INC Koren_Tubes.cir
TEXT -96 696 Left 2 !.op
TEXT 600 0 Left 2 ;R4=0R für U_out=0V
TEXT 496 464 Left 2 ;Stabi OB2
TEXT 1160 160 Left 2 ;Last
TEXT 248 -368 Left 2 ;Strombegrenzung
TEXT 592 368 Left 2 ;Referenzröhre
TEXT 296 64 Left 2 ;Regelverstärker
TEXT 72 -96 Left 2 ;Längsröhre
TEXT 960 104 Left 2 ;Poti
TEXT 584 -40 Left 2 ;R4=2220K für U_out=350V
TEXT 256 -288 Left 2 ;R9=42K für 20mA
TEXT 256 -328 Left 2 ;R9=7K für 60mA
TEXT -96 640 Left 2 ;.tran 0 10 5 1
TEXT -88 608 Left 2 ;{RP}
TEXT -96 728 Left 2 !.step param RP 2.5Meg 1R
TEXT 480 -152 Left 2 ;EZ41
TEXT 24 216 Left 2 ;EZ81