Version 4
SHEET 1 1064 680
WIRE 128 16 -96 16
WIRE 128 32 128 16
WIRE 464 80 304 80
WIRE 512 80 464 80
WIRE -96 96 -96 16
WIRE 304 96 304 80
WIRE 464 96 464 80
WIRE 128 128 128 112
WIRE 128 128 112 128
WIRE 224 128 128 128
WIRE 128 160 128 128
WIRE 224 192 224 128
WIRE 304 192 304 176
WIRE 304 192 224 192
WIRE 464 192 464 176
WIRE 464 192 304 192
WIRE -96 256 -96 176
WIRE 128 256 128 240
WIRE 128 256 -96 256
FLAG 112 128 0
FLAG 512 80 sek
IOPIN 512 80 Out
SYMBOL ind2 288 80 R0
SYMATTR InstName L1
SYMATTR Value {Lp/u/u}
SYMATTR Type ind
SYMATTR SpiceLine Rser={Rs}
SYMBOL ind2 112 16 R0
SYMATTR InstName L2
SYMATTR Value {Lp/4}
SYMATTR Type ind
SYMATTR SpiceLine Rser={Rp/2} Cpar={Cip/2}
SYMBOL ind2 112 144 R0
SYMATTR InstName L3
SYMATTR Value {Lp/4}
SYMATTR Type ind
SYMATTR SpiceLine Rser={Rp/2} Cpar={Cip/2}
SYMBOL voltage -96 80 R0
WINDOW 123 24 124 Left 2
WINDOW 39 24 152 Left 2
SYMATTR Value2 AC 1
SYMATTR SpiceLine Rser={Ri}
SYMATTR InstName V1
SYMATTR Value SINE(0 230 50)
SYMBOL res 448 80 R0
SYMATTR InstName R1
SYMATTR Value 8
TEXT 176 24 Left 2 !K123 L1 L2 L3 {sqrt(Lp/(Lp+Lsp))}
TEXT 296 248 Left 2 !.ac oct 10 1 1meg
TEXT -96 -120 Left 2 !.step param Ri list 180 2k 13k 52k
TEXT -96 -56 Left 2 !.param Lp=50H u=25.5 Lsp=9.5mH Cip=1250p Rp=100 Rs=0.05
TEXT -96 -88 Left 2 ;EL84: Katodenfolger, Triode, Pentode mit 12dB GK, Pentode