Version 4
SHEET 1 1096 680
WIRE -112 -64 -272 -64
WIRE 160 -64 -32 -64
WIRE 400 -64 320 -64
WIRE 480 -64 400 -64
WIRE 560 -64 480 -64
WIRE 672 -64 560 -64
WIRE 752 -64 672 -64
WIRE 160 -16 160 -64
WIRE 320 32 320 -64
WIRE 400 32 400 -64
WIRE 480 32 480 -64
WIRE 560 32 560 -64
WIRE 672 32 672 -64
WIRE -272 48 -272 -64
WIRE 160 112 160 64
WIRE -272 240 -272 128
WIRE 160 240 160 192
WIRE 160 240 -272 240
WIRE 320 240 320 112
WIRE 320 240 160 240
WIRE 400 240 400 112
WIRE 400 240 320 240
WIRE 480 240 480 112
WIRE 480 240 400 240
WIRE 560 240 560 112
WIRE 560 240 480 240
WIRE 672 240 672 112
WIRE 672 240 560 240
WIRE 752 240 672 240
WIRE 672 288 672 240
FLAG 672 288 0
SYMBOL voltage -272 32 R0
WINDOW 123 47 58 Left 2
WINDOW 39 48 86 Left 2
WINDOW 3 49 31 Left 2
WINDOW 0 14 9 Left 2
SYMATTR Value2 AC 20.8
SYMATTR SpiceLine Rser=0
SYMATTR Value SINE()
SYMATTR InstName V1
SYMBOL ind2 144 208 M180
WINDOW 0 36 80 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName L2
SYMATTR Value 145
SYMATTR Type ind
SYMATTR SpiceLine Ipk=0.10 Rser=655 Rpar=10Meg Cpar=1600pF
SYMBOL ind2 336 128 R180
WINDOW 0 36 80 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName L3
SYMATTR Value 1.8
SYMATTR Type ind
SYMATTR SpiceLine Ipk=0.02 Rser=19 Rpar=10Meg Cpar=20pF
SYMBOL res 656 16 R0
WINDOW 3 41 76 Left 2
SYMATTR Value 47k
SYMATTR InstName R2
SYMBOL res -16 -80 R90
WINDOW 0 65 47 VBottom 2
WINDOW 3 -37 5 VTop 2
SYMATTR InstName R1
SYMATTR Value 3500
SYMBOL ind2 144 80 M180
WINDOW 0 36 80 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName L1
SYMATTR Value 145
SYMATTR Type ind
SYMATTR SpiceLine Ipk=0.10 Rser=655 Rpar=10Meg Cpar=1600pF
SYMBOL ind2 416 128 R180
WINDOW 0 36 80 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName L4
SYMATTR Value 1.8
SYMATTR Type ind
SYMATTR SpiceLine Ipk=0.02 Rser=15 Rpar=10Meg Cpar=20p
SYMBOL ind2 496 128 R180
WINDOW 0 36 80 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName L5
SYMATTR Value 1.8
SYMATTR Type ind
SYMATTR SpiceLine Ipk=0.02 Rser=19 Rpar=10Meg Cpar=20p
SYMBOL ind2 576 128 R180
WINDOW 0 36 80 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName L6
SYMATTR Value 1.8
SYMATTR Type ind
SYMATTR SpiceLine Ipk=0.02 Rser=15 Rpar=10Meg Cpar=20p
TEXT 248 -8 VRight 1 !K1 L1 L2  L3 L4 L5 L6 0.98
TEXT 128 -224 Left 2 ;LL1689-18mA\n18:1 (ALT R) \n5...110kHz @ dB (simulated)\nUse EML Board EE27 Alt-R\nData by www.jacmusic.com
TEXT 128 288 Left 2 !.ac oct 100 5 200000
TEXT -184 -104 Left 2 ;Tube Ra =
TEXT 752 -64 Left 2 ;<==  Ri=40  Ohms \n \nCalculate Ri: \nTube Ra divided by 81\nwith R2 in parallel
TEXT -88 40 Left 2 ;Replace R1 and V1\nby driver tube\nR1 is tube Ra
TEXT 336 120 Left 2 ;A
TEXT 416 120 Left 2 ;B
TEXT 496 120 Left 2 ;A
TEXT 576 120 Left 2 ;B