Version 4 SHEET 1 2708 1400 WIRE -1520 -800 -1744 -800 WIRE -1008 -800 -1520 -800 WIRE -528 -800 -1008 -800 WIRE -1008 -720 -1008 -800 WIRE -1008 -576 -1008 -640 WIRE -528 -416 -528 -800 WIRE -1744 -240 -1744 -800 WIRE -1520 -240 -1520 -800 WIRE -848 -144 -928 -144 WIRE -688 -144 -768 -144 WIRE -528 -144 -528 -336 WIRE -528 -144 -624 -144 WIRE -480 -144 -528 -144 WIRE -336 -144 -480 -144 WIRE -64 -144 -272 -144 WIRE -528 -64 -528 -144 WIRE -64 -32 -64 -144 WIRE 272 -32 272 -112 WIRE 272 -32 112 -32 WIRE -480 -16 -480 -144 WIRE 272 -16 272 -32 WIRE -1744 0 -1744 -160 WIRE -1472 0 -1744 0 WIRE -1072 0 -1408 0 WIRE -928 0 -928 -144 WIRE -928 0 -1072 0 WIRE -576 0 -928 0 WIRE -1744 96 -1744 0 WIRE -1072 96 -1072 0 WIRE -1632 144 -1696 144 WIRE -1520 144 -1520 -160 WIRE -1520 144 -1632 144 WIRE 112 144 112 48 WIRE 272 144 272 64 WIRE -2208 160 -2368 160 WIRE -1904 160 -2080 160 WIRE -1792 160 -1904 160 WIRE -560 160 -560 48 WIRE -432 160 -560 160 WIRE -1632 176 -1632 144 WIRE -64 176 -64 48 WIRE -1904 256 -1904 160 WIRE -560 256 -560 160 WIRE -432 256 -432 160 WIRE -2368 272 -2368 160 WIRE -1776 288 -1776 208 WIRE -1632 288 -1632 240 WIRE -1632 288 -1776 288 WIRE -1072 288 -1072 176 WIRE -2208 304 -2208 240 WIRE -1776 320 -1776 288 WIRE -1632 320 -1632 288 WIRE -2368 416 -2368 352 WIRE -2080 432 -2080 240 WIRE -1904 432 -1904 336 WIRE -560 432 -560 336 WIRE -432 432 -432 320 WIRE -1776 496 -1776 400 WIRE -1632 496 -1632 384 FLAG -1776 496 0 FLAG -1008 -576 0 FLAG -1904 432 0 FLAG -1632 496 0 FLAG -2368 416 0 FLAG -1072 288 0 FLAG -560 432 0 FLAG -432 432 0 FLAG -64 176 0 FLAG 112 144 0 FLAG 272 144 0 FLAG -2080 432 0 FLAG -2208 304 0 FLAG 272 -112 OUT SYMBOL Misc\\tetrode -1744 144 R0 SYMATTR InstName U1 SYMATTR Value 6267_AN SYMBOL res -1760 -256 R0 SYMATTR InstName R1 SYMATTR Value 220k SYMBOL res -1792 304 R0 SYMATTR InstName R2 SYMATTR Value 2200 SYMBOL res -1536 -256 R0 SYMATTR InstName R3 SYMATTR Value 1Meg SYMBOL voltage -1008 -736 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 250 SYMBOL res -1920 240 R0 SYMATTR InstName R4 SYMATTR Value 220k SYMBOL cap -1648 320 R0 SYMATTR InstName C1 SYMATTR Value 470µ SYMBOL cap -1648 176 R0 SYMATTR InstName C2 SYMATTR Value 0.1µ SYMBOL cap -1408 -16 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C3 SYMATTR Value 1µ SYMBOL voltage -2368 256 R0 WINDOW 123 24 124 Left 2 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value SINE(0 0.013 1k) SYMATTR Value2 AC 1 SYMBOL res -1088 80 R0 SYMATTR InstName R5 SYMATTR Value 500k SYMBOL Misc\\tetrode -528 -16 R0 SYMATTR InstName U2 SYMATTR Value 6267_AN SYMBOL res -576 240 R0 SYMATTR InstName R6 SYMATTR Value 1500 SYMBOL cap -448 256 R0 SYMATTR InstName C4 SYMATTR Value 470µ SYMBOL ind -544 -432 R0 SYMATTR InstName L1 SYMATTR Value 150 SYMATTR SpiceLine Rser=3500 Cpar=33p SYMBOL cap -272 -160 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C5 SYMATTR Value 1µ SYMBOL cap -624 -160 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C6 SYMATTR Value 47n SYMBOL res -752 -160 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R7 SYMATTR Value 470k SYMBOL ind2 -80 -48 R0 SYMATTR InstName L2 SYMATTR Value 25 SYMATTR Type ind SYMATTR SpiceLine Rser=350 SYMBOL ind2 128 64 R180 WINDOW 0 36 80 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName L3 SYMATTR Value 1 SYMATTR Type ind SYMATTR SpiceLine Rser=33 SYMBOL res 256 -32 R0 SYMATTR InstName R8 SYMATTR Value 2200 SYMBOL ind2 -2224 144 R0 SYMATTR InstName L4 SYMATTR Value 1 SYMATTR Type ind SYMATTR SpiceLine Rser=8 SYMBOL ind2 -2064 256 R180 WINDOW 0 36 80 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName L5 SYMATTR Value 100 SYMATTR Type ind SYMATTR SpiceLine Rser=200 TEXT -1924 1384 Left 2 !.tran 0 100m 96m TEXT 1576 792 Left 2 !.inc tubemodels.txt TEXT 152 -232 Left 2 !K1 L2 L3 1 TEXT -2560 -576 Left 2 !K2 L4 L5 1 TEXT 440 -304 Left 2 !.four 1000 V(OUT)