Version 4 SHEET 1 1944 712 WIRE 144 -368 -16 -368 WIRE 208 -368 144 -368 WIRE 368 -368 288 -368 WIRE 432 -368 368 -368 WIRE 560 -368 512 -368 WIRE -16 -256 -16 -368 WIRE 144 -256 144 -368 WIRE 368 -256 368 -368 WIRE 432 -256 368 -256 WIRE 560 -256 560 -368 WIRE 560 -256 512 -256 WIRE -368 -208 -464 -208 WIRE -240 -208 -304 -208 WIRE -112 -208 -240 -208 WIRE -64 -208 -112 -208 WIRE 96 -208 64 -208 WIRE -112 -96 -112 -208 WIRE 64 -96 64 -208 WIRE 64 -96 -112 -96 WIRE 368 -80 368 -256 WIRE 560 -80 560 -256 WIRE -48 -32 -48 -160 WIRE 112 -32 112 -160 WIRE 112 -32 -48 -32 WIRE 176 -32 112 -32 WIRE 256 -32 176 -32 WIRE 304 -32 256 -32 WIRE 256 0 256 -32 WIRE -240 32 -240 -208 WIRE 176 48 176 -32 WIRE 192 48 176 48 WIRE 256 128 256 96 WIRE 368 128 368 16 WIRE -464 224 -464 -208 WIRE 256 240 256 208 WIRE 368 240 368 208 WIRE 368 240 256 240 WIRE 256 272 256 240 WIRE 368 288 368 240 WIRE -464 384 -464 304 WIRE -240 384 -240 112 WIRE -240 384 -464 384 WIRE 256 384 256 336 WIRE 256 384 -240 384 WIRE 368 384 368 368 WIRE 368 384 256 384 WIRE 560 384 560 0 WIRE 560 384 368 384 WIRE 368 416 368 384 FLAG 368 416 0 SYMBOL npn 304 -80 R0 SYMATTR InstName Q1 SYMATTR Value BU508A SYMBOL Misc\\EuropeanResistor 352 272 R0 SYMATTR InstName R1 SYMATTR Value 120R SYMBOL Misc\\EuropeanResistor -224 128 R180 WINDOW 0 31 76 Left 2 WINDOW 3 31 40 Left 2 SYMATTR InstName R2 SYMATTR Value 1Meg SYMBOL voltage 560 -96 R0 WINDOW 123 0 0 Left 2 WINDOW 39 36 42 Left 2 SYMATTR SpiceLine Rser=0 SYMATTR InstName V1 SYMATTR Value 260 SYMBOL Misc\\EuropeanResistor 352 112 R0 SYMATTR InstName R3 SYMATTR Value 10R SYMBOL Misc\\EuropeanResistor 240 112 R0 SYMATTR InstName R4 SYMATTR Value 100R SYMBOL npn 192 0 R0 SYMATTR InstName Q2 SYMATTR Value BU508A SYMBOL Misc\\triode -16 -208 R0 SYMATTR InstName U1 SYMATTR Value 12AU7 SYMBOL Misc\\triode 144 -208 R0 SYMATTR InstName U2 SYMATTR Value 12AU7 SYMBOL Misc\\EuropeanResistor 304 -384 R90 WINDOW 0 5 56 VBottom 2 WINDOW 3 27 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 1R SYMBOL cap -304 -224 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 10nF SYMBOL voltage -464 208 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value SINE(0 12 1K) SYMBOL cap 240 272 R0 SYMATTR InstName C2 SYMATTR Value 100µ SYMBOL res 528 -272 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 1600 SYMBOL ind 416 -352 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 10H TEXT -56 448 Left 2 !.tran 0 10m 5m 50µ TEXT -56 528 Left 2 !.model BU508A NPN(Is=148.5p Xti=3 Eg=1.11 Vaf=100 Bf=43.23 Ise=1.355n\n+ Ne=1.413 Ikf=8.245 Nk=.8069 Xtb=1.75 Br=2.131 Isc=529.1p\n+ Nc=1.567 Ikr=1.689 Rc=32.64m Cjc=303.6p Mjc=.3333 Vjc=.5 Fc=.5\n+ Cje=910.8p Mje=.3333 Vje=.5 Tr=16.1u Tf=22.02n Itf=183.6\n+ Xtf=18.91K Vtf=10)\n* TELEFUNKEN pid=bu508 case=TOP3\n* 91-08-14 dsq TEXT -56 480 Left 2 !.inc koren_tubes.cir TEXT 408 -144 Left 2 ;ri=800R