Version 4
SHEET 1 880 680
WIRE -1504 -960 -1520 -960
WIRE -1344 -960 -1504 -960
WIRE -1504 -928 -1504 -960
WIRE -1344 -928 -1344 -960
WIRE -1760 -848 -1760 -896
WIRE -1504 -816 -1504 -848
WIRE -1152 -816 -1504 -816
WIRE -1056 -816 -1088 -816
WIRE -848 -816 -1056 -816
WIRE -848 -784 -848 -816
WIRE -896 -768 -944 -768
WIRE -1344 -752 -1344 -848
WIRE -1200 -752 -1344 -752
WIRE -672 -736 -784 -736
WIRE -368 -736 -480 -736
WIRE -224 -736 -368 -736
WIRE -1056 -720 -1056 -816
WIRE -224 -720 -224 -736
WIRE -1504 -704 -1504 -816
WIRE -1344 -704 -1344 -752
WIRE -368 -704 -368 -736
WIRE -1696 -656 -1712 -656
WIRE -1600 -656 -1632 -656
WIRE -1552 -656 -1600 -656
WIRE -1248 -656 -1296 -656
WIRE -2480 -608 -2480 -656
WIRE -2448 -608 -2480 -608
WIRE -2336 -608 -2336 -656
WIRE -2336 -608 -2368 -608
WIRE -2304 -608 -2336 -608
WIRE -2192 -608 -2192 -656
WIRE -2192 -608 -2224 -608
WIRE -2160 -608 -2192 -608
WIRE -2048 -608 -2048 -640
WIRE -2048 -608 -2080 -608
WIRE -2016 -608 -2048 -608
WIRE -1888 -608 -1888 -640
WIRE -1888 -608 -1936 -608
WIRE -1808 -608 -1888 -608
WIRE -1056 -592 -1056 -640
WIRE -1056 -592 -1088 -592
WIRE -832 -592 -832 -688
WIRE -832 -592 -848 -592
WIRE -672 -592 -704 -592
WIRE -368 -592 -368 -624
WIRE -368 -592 -480 -592
WIRE -336 -592 -368 -592
WIRE -2480 -576 -2480 -608
WIRE -2336 -576 -2336 -608
WIRE -2192 -576 -2192 -608
WIRE -2048 -576 -2048 -608
WIRE -1888 -576 -1888 -608
WIRE -1536 -560 -1536 -608
WIRE -1424 -560 -1536 -560
WIRE -1312 -560 -1312 -608
WIRE -1312 -560 -1424 -560
WIRE -1056 -544 -1056 -592
WIRE -1424 -528 -1424 -560
WIRE -832 -496 -832 -592
WIRE -2480 -480 -2480 -512
WIRE -2336 -480 -2336 -512
WIRE -2192 -480 -2192 -512
WIRE -2048 -480 -2048 -512
WIRE -1888 -480 -1888 -512
WIRE -1808 -448 -1808 -608
WIRE -672 -448 -784 -448
WIRE -432 -448 -480 -448
WIRE -336 -448 -432 -448
WIRE -1712 -416 -1712 -656
WIRE -1600 -416 -1600 -656
WIRE -1552 -416 -1600 -416
WIRE -1424 -416 -1424 -448
WIRE -1424 -416 -1472 -416
WIRE -1376 -416 -1424 -416
WIRE -1248 -416 -1248 -656
WIRE -1248 -416 -1296 -416
WIRE -944 -416 -944 -768
WIRE -896 -416 -944 -416
WIRE -1424 -384 -1424 -416
WIRE -1200 -352 -1200 -752
WIRE -1152 -352 -1200 -352
WIRE -1056 -352 -1056 -464
WIRE -1056 -352 -1088 -352
WIRE -848 -352 -848 -400
WIRE -848 -352 -1056 -352
WIRE -432 -304 -432 -448
WIRE -368 -304 -432 -304
WIRE -256 -304 -288 -304
WIRE -1568 -272 -1648 -272
WIRE -1536 -272 -1568 -272
WIRE -1424 -272 -1424 -304
WIRE -1424 -272 -1456 -272
WIRE -1392 -272 -1424 -272
WIRE -1568 -240 -1568 -272
WIRE -944 -240 -944 -416
WIRE -1648 -224 -1648 -272
WIRE -1248 -224 -1248 -416
WIRE -1808 -176 -1808 -368
WIRE -1808 -176 -1856 -176
WIRE -1856 -160 -1856 -176
WIRE -1808 -128 -1808 -176
WIRE -1760 -128 -1760 -768
WIRE -1760 -128 -1808 -128
WIRE -1712 -128 -1712 -336
WIRE -1712 -128 -1760 -128
WIRE -1648 -128 -1648 -160
WIRE -1648 -128 -1712 -128
WIRE -1568 -128 -1568 -160
WIRE -1568 -128 -1648 -128
WIRE -1248 -128 -1248 -160
WIRE -1248 -128 -1568 -128
WIRE -944 -128 -944 -160
WIRE -944 -128 -1248 -128
FLAG -1520 -960 +320V
IOPIN -1520 -960 In
FLAG -848 -592 HT2
IOPIN -848 -592 In
FLAG -224 -720 0
FLAG -336 -592 LOAD_8_Ohm
IOPIN -336 -592 Out
FLAG -1088 -592 BIAS
IOPIN -1088 -592 In
FLAG -704 -592 +470V
IOPIN -704 -592 In
FLAG -256 -304 feedback
IOPIN -256 -304 Out
FLAG -1392 -272 feedback
IOPIN -1392 -272 Out
FLAG -336 -448 LOAD_16_Ohm
IOPIN -336 -448 Out
FLAG -1856 -160 0
FLAG -2336 -656 +270V
IOPIN -2336 -656 Out
FLAG -2480 -480 0
FLAG -2480 -656 +250V
IOPIN -2480 -656 Out
FLAG -2192 -656 +320V
IOPIN -2192 -656 Out
FLAG -2336 -480 0
FLAG -1760 -896 BIAS
IOPIN -1760 -896 Out
FLAG -2192 -480 0
FLAG -2048 -480 0
FLAG -2048 -640 HT2
IOPIN -2048 -640 In
FLAG -1888 -640 +470V
IOPIN -1888 -640 In
FLAG -1888 -480 0
SYMBOL res -1520 -944 R0
SYMATTR InstName R2
SYMATTR Value 100K
SYMBOL res -1440 -544 R0
SYMATTR InstName R3
SYMATTR Value 470
SYMBOL res -1440 -400 R0
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL res -1584 -256 R0
SYMATTR InstName R5
SYMATTR Value 2.5K
SYMBOL res -1360 -944 R0
SYMATTR InstName R6
SYMATTR Value 100K
SYMBOL res -1280 -432 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R7
SYMATTR Value 1Meg
SYMBOL cap -1632 -672 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C1
SYMATTR Value 22n
SYMBOL cap -1264 -224 R0
SYMATTR InstName C2
SYMATTR Value 100n
SYMBOL res -1456 -432 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R8
SYMATTR Value 1Meg
SYMBOL res -384 -608 M180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R9
SYMATTR Value 8
SYMBOL res -1072 -736 R0
SYMATTR InstName R10
SYMATTR Value 100K
SYMBOL res -1072 -560 R0
SYMATTR InstName R11
SYMATTR Value 100K
SYMBOL cap -1088 -832 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C3
SYMATTR Value 100n
SYMBOL cap -1088 -368 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C4
SYMATTR Value 100n
SYMBOL res -272 -288 M270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R12
SYMATTR Value 100K
SYMBOL res -960 -256 R0
SYMATTR InstName R13
SYMATTR Value 1
SYMBOL res -1440 -288 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R14
SYMATTR Value 2.5K
SYMBOL cap -1664 -224 R0
SYMATTR InstName C5
SYMATTR Value 100n
SYMBOL voltage -1712 -432 R0
WINDOW 123 24 132 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value2 AC 1 0
SYMATTR InstName V1
SYMATTR Value SINE(0 .5 200)
SYMBOL VOLTAGE -1808 -464 R0
WINDOW 123 0 0 Left 0
WINDOW 0 -93 33 Left 0
WINDOW 3 -79 104 Left 0
SYMATTR InstName Vin1
SYMATTR Value 470
SYMATTR SpiceLine Rser=320
SYMBOL res -2208 -624 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R15
SYMATTR Value 10K
SYMBOL cap -2496 -576 R0
SYMATTR InstName C6
SYMATTR Value 16µ
SYMATTR SpiceLine V=25 Irms=1.76 Rser=0.049 MTBF=0 Lser=0 mfg="KEMET" pn="C1206C105K3RAC" type="X7R" ppPkg=1
SYMBOL res -2352 -624 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R16
SYMATTR Value 10K
SYMBOL cap -2352 -576 R0
SYMATTR InstName C7
SYMATTR Value 16µ
SYMATTR SpiceLine V=25 Irms=1.76 Rser=0.049 MTBF=0 Lser=0 mfg="KEMET" pn="C1206C105K3RAC" type="X7R" ppPkg=1
SYMBOL voltage -1760 -752 R180
WINDOW 0 -117 41 Left 0
WINDOW 3 -89 16 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 -136 -11 Left 0
SYMATTR InstName VBIAS1
SYMATTR Value 27V
SYMATTR SpiceLine Rser=1000
SYMBOL cap -2208 -576 R0
SYMATTR InstName C8
SYMATTR Value 16µ
SYMATTR SpiceLine V=25 Irms=1.76 Rser=0.049 MTBF=0 Lser=0 mfg="KEMET" pn="C1206C105K3RAC" type="X7R" ppPkg=1
SYMBOL ind -1920 -624 R90
WINDOW 0 5 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName L5
SYMATTR Value 5H
SYMBOL res -2064 -624 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R17
SYMATTR Value 10K
SYMBOL cap -2064 -576 R0
SYMATTR InstName C9
SYMATTR Value 16µ
SYMATTR SpiceLine V=25 Irms=1.76 Rser=0.049 MTBF=0 Lser=0 mfg="KEMET" pn="C1206C105K3RAC" type="X7R" ppPkg=1
SYMBOL cap -1904 -576 R0
SYMATTR InstName C10
SYMATTR Value 16µ
SYMATTR SpiceLine V=25 Irms=1.76 Rser=0.049 MTBF=0 Lser=0 mfg="KEMET" pn="C1206C105K3RAC" type="X7R" ppPkg=1
SYMBOL pushpull -576 -592 R0
SYMATTR InstName U5
SYMBOL Valve\\triode -1504 -656 R0
WINDOW 38 19 64 Center 0
SYMATTR SpiceModel 12AX7A
SYMATTR InstName U1
SYMBOL Valve\\triode -1344 -656 M0
WINDOW 38 14 64 Center 0
SYMATTR SpiceModel 12AX7A
SYMATTR InstName U2
SYMBOL Valve\\Tetrode -832 -736 R90
WINDOW 0 -67 -26 VRight 0
WINDOW 38 82 37 VCenter 0
SYMATTR InstName U3
SYMATTR SpiceModel EL34
SYMBOL Valve\\Tetrode -832 -448 M270
WINDOW 0 -67 -26 VRight 0
WINDOW 38 82 37 VCenter 0
SYMATTR InstName U4
SYMATTR SpiceModel EL34
TEXT -1240 -912 Left 0 !;ac dec 1000 10 30000
TEXT -1240 -944 Left 0 !.tran 100m