Version 4 SHEET 1 1540 680 WIRE -176 -656 -448 -656 WIRE 48 -656 -176 -656 WIRE 256 -656 48 -656 WIRE 624 -656 256 -656 WIRE 768 -656 704 -656 WIRE 1136 -656 768 -656 WIRE 48 -608 48 -656 WIRE 256 -608 256 -656 WIRE 768 -608 768 -656 WIRE -176 -592 -176 -656 WIRE -448 -560 -448 -656 WIRE 1136 -512 1136 -656 WIRE 1136 -512 1088 -512 WIRE 1200 -512 1136 -512 WIRE 1376 -512 1264 -512 WIRE 1408 -512 1376 -512 WIRE 1440 -512 1408 -512 WIRE 48 -496 48 -544 WIRE 256 -496 256 -528 WIRE 672 -496 256 -496 WIRE 768 -496 768 -544 WIRE -176 -464 -176 -512 WIRE -176 -464 -304 -464 WIRE 256 -464 256 -496 WIRE 1200 -464 1200 -512 WIRE 1264 -464 1264 -512 WIRE 1088 -448 1088 -512 WIRE 1376 -448 1376 -512 WIRE -448 -416 -448 -480 WIRE -304 -416 -304 -464 WIRE -176 -416 -176 -464 WIRE 256 -352 256 -400 WIRE 1088 -336 1088 -384 WIRE 1136 -336 1088 -336 WIRE 1200 -336 1200 -384 WIRE 1200 -336 1136 -336 WIRE 1264 -336 1264 -384 WIRE 1328 -336 1264 -336 WIRE 1376 -336 1376 -384 WIRE 1376 -336 1328 -336 WIRE -304 -320 -304 -352 WIRE -176 -288 -176 -336 WIRE 48 -288 -176 -288 WIRE 160 -288 48 -288 WIRE 208 -288 160 -288 WIRE 400 -288 368 -288 WIRE 496 -288 400 -288 WIRE 832 -288 560 -288 WIRE 1328 -256 1328 -336 WIRE 48 -240 48 -288 WIRE 1136 -224 1136 -336 WIRE 1136 -224 1088 -224 WIRE 1088 -160 1088 -224 WIRE -176 -144 -176 -288 WIRE 48 -144 48 -176 WIRE 112 -144 48 -144 WIRE 192 -144 112 -144 WIRE 272 -144 192 -144 WIRE 1248 -112 1136 -112 WIRE -224 -96 -288 -96 WIRE 48 -96 48 -144 WIRE 112 -96 112 -144 WIRE 192 -96 192 -144 WIRE 272 -96 272 -144 WIRE 496 -96 368 -96 WIRE 832 -96 832 -288 WIRE 832 -96 560 -96 WIRE 944 -96 832 -96 WIRE 1040 -96 944 -96 WIRE -288 -32 -288 -96 WIRE 48 32 48 -16 WIRE 112 32 112 -32 WIRE 112 32 48 32 WIRE 192 32 192 -32 WIRE 192 32 112 32 WIRE 272 32 272 -32 WIRE 272 32 192 32 WIRE 672 48 672 -496 WIRE 1248 48 1248 -112 WIRE 1248 48 672 48 WIRE 48 80 48 32 WIRE -208 96 -208 -48 WIRE -112 96 -208 96 WIRE 944 96 944 -96 WIRE 1056 112 1056 -48 WIRE -208 128 -208 96 WIRE -112 128 -112 96 WIRE 672 144 672 48 WIRE 208 192 144 192 WIRE 256 192 208 192 WIRE 288 192 256 192 WIRE 368 192 368 -96 WIRE 368 192 288 192 WIRE 400 192 368 192 WIRE 480 192 464 192 WIRE 560 192 480 192 WIRE 624 192 560 192 WIRE -736 224 -736 176 WIRE 560 224 560 192 WIRE 944 224 944 176 WIRE 944 224 896 224 WIRE 992 224 944 224 WIRE -608 240 -608 176 WIRE -272 240 -384 240 WIRE -208 240 -208 208 WIRE -112 240 -112 192 WIRE -112 240 -208 240 WIRE 144 240 144 192 WIRE 208 240 208 192 WIRE 288 240 288 192 WIRE 368 240 368 192 WIRE 896 240 896 224 WIRE 992 256 992 224 WIRE 480 272 480 192 WIRE -272 288 -272 240 WIRE -208 288 -208 240 WIRE -112 288 -112 240 WIRE 1152 304 1152 256 WIRE 560 320 560 288 WIRE 640 320 640 240 WIRE 640 320 560 320 WIRE -736 352 -736 304 WIRE 896 352 896 320 WIRE 992 352 992 320 WIRE -608 368 -608 320 WIRE 144 368 144 320 WIRE 208 368 208 304 WIRE 208 368 144 368 WIRE 288 368 288 304 WIRE 288 368 208 368 WIRE 368 368 368 304 WIRE 368 368 288 368 WIRE 640 384 640 320 WIRE 720 384 640 384 WIRE -208 416 -208 368 WIRE -112 416 -112 352 WIRE -112 416 -208 416 WIRE 144 416 144 368 WIRE 480 416 480 352 WIRE 640 416 640 384 WIRE 720 416 720 384 WIRE 1152 432 1152 384 WIRE -736 496 -736 432 WIRE -272 496 -272 368 WIRE -208 496 -208 416 WIRE 640 528 640 496 WIRE 720 528 720 480 WIRE 720 528 640 528 WIRE 640 576 640 528 WIRE 1152 576 1152 512 FLAG -272 496 0 FLAG -208 496 0 FLAG -448 -416 0 FLAG -304 -320 0 FLAG -288 -32 0 FLAG -384 240 AE FLAG -736 496 0 FLAG -736 176 AE FLAG 48 80 0 FLAG 144 416 0 FLAG 640 576 0 FLAG 480 416 0 FLAG 48 -496 0 FLAG 256 -352 0 FLAG 768 -496 0 FLAG 1328 -256 0 FLAG 1056 112 0 FLAG 1152 576 0 FLAG 1152 256 IF FLAG 896 352 0 FLAG 992 352 0 FLAG -608 368 0 FLAG -608 176 M FLAG 256 192 Vlo FLAG 160 -288 RF FLAG 400 -288 M FLAG 1408 -512 out SYMBOL ind2 -288 272 R0 WINDOW 0 -34 34 Left 0 WINDOW 3 -60 85 Left 0 SYMATTR InstName L1 SYMATTR Value 0.3µ SYMATTR Type ind SYMATTR SpiceLine Rser=0.05 SYMBOL ind2 -192 384 R180 WINDOW 0 -35 77 Left 0 WINDOW 3 -51 30 Left 0 SYMATTR InstName L2 SYMATTR Value 0.3µ SYMATTR Type ind SYMATTR SpiceLine Rser=0.05 SYMBOL cap -128 288 R0 SYMATTR InstName C1 SYMATTR Value 47p SYMBOL ind2 -192 -432 R0 WINDOW 0 46 40 Left 0 WINDOW 3 45 83 Left 0 SYMATTR InstName L3 SYMATTR Value 4.7µ SYMATTR SpiceLine Rser=0.05 SYMATTR Type ind SYMBOL voltage -448 -576 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 120 SYMBOL res -192 -608 R0 SYMATTR InstName R1 SYMATTR Value 1k SYMBOL cap -320 -416 R0 SYMATTR InstName C2 SYMATTR Value 10n SYMBOL res -224 112 R0 SYMATTR InstName R2 SYMATTR Value 220 SYMBOL cap -128 128 R0 SYMATTR InstName C3 SYMATTR Value 1n SYMBOL voltage -736 336 R0 WINDOW 123 24 132 Left 0 WINDOW 39 24 132 Left 0 SYMATTR Value2 AC 200u SYMATTR InstName V2 SYMATTR Value SFFM(0 200u 88meg 10 20k) SYMBOL res -752 208 R0 SYMATTR InstName R3 SYMATTR Value 75 SYMBOL ind2 64 -112 M0 WINDOW 0 45 40 Left 0 WINDOW 3 46 80 Left 0 SYMATTR InstName L4 SYMATTR Value 0.09µ SYMATTR SpiceLine Rser=0.05 SYMATTR Type ind SYMBOL cap 96 -96 R0 SYMATTR InstName C4 SYMATTR Value 10p SYMBOL cap 176 -96 R0 SYMATTR InstName C5 SYMATTR Value 6.8p SYMBOL cap 256 -96 R0 SYMATTR InstName C6 SYMATTR Value 20p SYMBOL cap 32 -240 R0 SYMATTR InstName C7 SYMATTR Value 1n SYMBOL ind2 160 224 M0 WINDOW 0 46 40 Left 0 WINDOW 3 46 80 Left 0 SYMATTR InstName L5 SYMATTR Value 0.07µ SYMATTR Type ind SYMATTR SpiceLine Rser=0.05 SYMBOL cap 192 240 R0 SYMATTR InstName C8 SYMATTR Value 10p SYMBOL cap 272 240 R0 SYMATTR InstName C9 SYMATTR Value 4.7p SYMBOL cap 352 240 R0 SYMATTR InstName C10 SYMATTR Value 20p SYMBOL ind 656 400 M0 WINDOW 0 51 40 Left 0 WINDOW 3 51 78 Left 0 SYMATTR InstName L6 SYMATTR Value 1µ SYMATTR SpiceLine Rser=0.05 SYMBOL cap 704 416 R0 SYMATTR InstName C11 SYMATTR Value 10p SYMBOL res 464 256 R0 SYMATTR InstName R4 SYMATTR Value 22k SYMBOL cap 400 176 M90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C12 SYMATTR Value 47p SYMBOL cap 544 224 R0 SYMATTR InstName C13 SYMATTR Value 1p SYMBOL cap 32 -608 R0 SYMATTR InstName C14 SYMATTR Value 10n SYMBOL res 240 -624 R0 SYMATTR InstName R5 SYMATTR Value 2.2k SYMBOL cap 240 -464 R0 SYMATTR InstName C15 SYMATTR Value 1µ SYMBOL res 720 -672 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R6 SYMATTR Value 1k SYMBOL cap 752 -608 R0 SYMATTR InstName C16 SYMATTR Value 10n SYMBOL ind2 1184 -480 R0 WINDOW 0 -4 36 Right 0 WINDOW 3 -6 71 Right 0 SYMATTR InstName L7 SYMATTR Value 22µ SYMATTR Type ind SYMATTR SpiceLine Rser=5 Rpar=100k SYMBOL ind2 1280 -368 R180 WINDOW 0 -7 80 Right 0 WINDOW 3 -12 42 Right 0 SYMATTR InstName L8 SYMATTR Value 22µ SYMATTR Type ind SYMATTR SpiceLine Rser=5 Rpar=100k SYMBOL voltage 1152 416 R0 WINDOW 123 24 132 Left 0 WINDOW 39 24 132 Left 0 SYMATTR InstName V3 SYMATTR Value SINE(0 .32m 10.7meg) SYMBOL res 1136 288 R0 SYMATTR InstName R7 SYMATTR Value 1k SYMBOL res 912 224 M0 SYMATTR InstName R8 SYMATTR Value 470k SYMBOL ind 928 80 R0 SYMATTR InstName L9 SYMATTR Value 2.2µ SYMATTR SpiceLine Rser=0.1 Rpar=100k SYMBOL cap 976 256 R0 SYMATTR InstName C19 SYMATTR Value 1n SYMBOL cap 560 -112 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C20 SYMATTR Value 2.2p SYMBOL cap 1392 -448 M0 SYMATTR InstName C18 SYMATTR Value 10p SYMBOL cap 1104 -448 M0 SYMATTR InstName C17 SYMATTR Value 10p SYMBOL cap 560 -304 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C21 SYMATTR Value 22p SYMBOL bv -608 224 R0 SYMATTR InstName B1 SYMATTR Value V=V(RF) SYMBOL Valve\\triode -176 -96 R0 SYMATTR InstName U1 SYMATTR SpiceModel ECC88 SYMBOL Valve\\triode 672 192 R0 WINDOW 38 17 68 Center 0 SYMATTR InstName U2 SYMATTR SpiceModel ECF80t SYMBOL Misc\\tetrode 1088 -112 R0 SYMATTR InstName U3 SYMATTR Value ECF80p TEXT -192 440 Left 0 !K1 L1 L2 0.6 TEXT -752 0 Left 0 ;.ac lin 200 85meg 110meg TEXT -752 40 Left 0 ;.tran 0 10us 9.9us TEXT -752 80 Left 0 !.tran 100us TEXT 128 56 Left 0 ;tuned to\n88 MHz TEXT 216 392 Left 0 ;tuned to\n98.7 MHz TEXT 624 104 Right 0 ;Local\noscillator TEXT 1160 -536 Left 0 !K2 L7 L8 0.1 TEXT 1056 -216 Right 0 ;Mixer/-\nfirst IF TEXT 1240 400 Left 0 ;.ac lin 100 5meg 15meg TEXT -1008 -656 Left 0 ;VALVE FM TUNERHEAD STUDY\nLoosely based on Citation III-X schematic\nand RCA Receiving Tube Manual c. 1966\npage 528.\n \n10/08/2010\n \nEnable the following to:\n.ac lin 200 ~ see RF tuned circuits peaking.\n \n.tran 0 10us ~ close up of RF or local\noscillator, = 1 cycle of the IF (100ns).\n \n.tran 100us ~ see FM modulation where going\noff the centre freq. causes a drop in amplitude.\n \nNote B1 must be used to isolate RF amp\nelse LO signal leaks back onto 'AE'. In\nreal life U1 grid would prevent that. TEXT -216 -176 Right 0 ;RF amplifier TEXT 208 -192 Left 0 ;trimmer TEXT 320 -160 Left 0 ;tuning cap TEXT 304 464 Left 0 ;trimmer TEXT 392 496 Left 0 ;tuning cap TEXT 1192 -296 Left 0 ;10.7 MHz LINE Normal 368 -288 208 -288 LINE Normal 240 -176 208 -112 LINE Normal 368 -144 320 -96 LINE Normal 352 448 304 320 LINE Normal 432 480 384 336