Version 4 SHEET 1 2196 1384 WIRE -368 -240 -816 -240 WIRE -80 -240 -368 -240 WIRE -368 -192 -368 -240 WIRE -368 -176 -368 -192 WIRE -368 -96 -368 -128 WIRE -368 -96 -464 -96 WIRE -288 -96 -368 -96 WIRE -464 -32 -464 -96 WIRE -288 0 -288 -96 WIRE 256 48 112 48 WIRE 400 48 256 48 WIRE 624 48 400 48 WIRE 720 48 624 48 WIRE 896 48 720 48 WIRE 400 96 400 48 WIRE 1248 96 1136 96 WIRE 112 112 112 48 WIRE -464 128 -464 48 WIRE -416 128 -464 128 WIRE -288 128 -288 64 WIRE -288 128 -336 128 WIRE 1248 128 1248 96 WIRE -816 176 -816 -240 WIRE 256 176 256 48 WIRE 256 192 256 176 WIRE 624 192 624 48 WIRE 256 208 256 192 WIRE 896 208 896 48 WIRE 1136 208 1136 96 WIRE 624 240 624 192 WIRE -288 256 -288 128 WIRE -288 256 -464 256 WIRE -80 256 -80 -240 WIRE 160 256 -80 256 WIRE 208 256 160 256 WIRE 304 288 256 288 WIRE 400 288 400 176 WIRE 400 288 368 288 WIRE 432 288 400 288 WIRE 528 288 512 288 WIRE 560 288 528 288 WIRE -464 320 -464 256 WIRE 256 336 256 288 WIRE -288 352 -288 256 WIRE 624 352 624 336 WIRE 720 352 624 352 WIRE 896 352 896 288 WIRE 896 352 784 352 WIRE 1136 352 1136 288 WIRE 1136 352 896 352 WIRE 1216 352 1136 352 WIRE 1376 352 1280 352 WIRE 1424 352 1376 352 WIRE -816 368 -816 256 WIRE 256 368 256 336 WIRE 400 368 400 288 WIRE 1376 368 1376 352 WIRE 624 384 624 352 WIRE 624 400 624 384 WIRE -464 480 -464 400 WIRE -416 480 -464 480 WIRE -288 480 -288 416 WIRE -288 480 -336 480 WIRE -80 480 -80 256 WIRE -16 480 -80 480 WIRE 112 480 112 192 WIRE 112 480 64 480 WIRE 144 480 112 480 WIRE 256 480 256 448 WIRE 256 480 224 480 WIRE 1376 480 1376 448 WIRE -816 560 -816 448 WIRE -288 560 -288 480 WIRE 256 560 256 480 WIRE 400 560 400 448 WIRE 624 560 624 480 WIRE 1520 736 736 736 WIRE 736 816 736 736 WIRE 1520 816 1520 736 WIRE 1520 816 736 816 WIRE 736 864 736 816 WIRE 1520 864 1520 816 WIRE 1520 864 736 864 WIRE 736 944 736 864 WIRE 1520 944 1520 864 WIRE 1520 944 736 944 FLAG -816 560 0 FLAG 624 560 0 FLAG 400 560 0 FLAG 256 560 0 FLAG 1248 208 0 FLAG 720 112 0 FLAG 1376 480 0 FLAG 160 256 G FLAG 624 384 E FLAG 256 336 S FLAG 256 176 D FLAG 896 48 Vcc FLAG 1248 96 DC-in FLAG 528 288 B FLAG 624 192 C FLAG 1376 352 OUT FLAG -288 560 0 SYMBOL ind 880 304 M180 WINDOW 0 36 80 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName L6 SYMATTR Value 500u SYMATTR SpiceLine Rser=0.001 SYMBOL voltage 1248 112 R0 WINDOW 0 43 39 Left 2 WINDOW 3 42 95 Left 2 WINDOW 123 0 0 Left 0 WINDOW 39 42 123 Left 2 SYMATTR InstName V3 SYMATTR Value 13.8 SYMATTR SpiceLine Rser=0.1 SYMBOL Misc\\EuropeanResistor 80 464 R90 WINDOW 0 5 56 VBottom 2 WINDOW 3 27 60 VTop 2 SYMATTR InstName R2 SYMATTR Value 1Meg SYMBOL ind 1120 192 R0 SYMATTR InstName L7 SYMATTR Value 400u SYMBOL cap 1280 336 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 44 30 VTop 2 SYMATTR InstName C1 SYMATTR Value 100n SYMBOL npn 560 240 R0 SYMATTR InstName Q1 SYMATTR Value 2N5109 SYMBOL cap 784 336 R90 WINDOW 0 -6 3 VBottom 2 WINDOW 3 36 2 VTop 2 SYMATTR InstName C2 SYMATTR Value 100n SYMBOL Misc\\EuropeanResistor 96 96 R0 SYMATTR InstName R1 SYMATTR Value 1Meg SYMBOL Misc\\EuropeanResistor 240 464 R90 WINDOW 0 5 56 VBottom 2 WINDOW 3 27 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 1Meg SYMBOL Misc\\EuropeanResistor 240 352 R0 SYMATTR InstName R4 SYMATTR Value 680 SYMBOL Misc\\EuropeanResistor 640 496 R180 WINDOW 0 -43 74 Left 2 WINDOW 3 -38 36 Left 2 SYMATTR InstName R5 SYMATTR Value 220 SYMBOL cap 736 112 R180 WINDOW 0 5 95 Left 2 WINDOW 3 33 13 Left 2 SYMATTR InstName C5 SYMATTR Value 100n SYMBOL cap -272 64 R180 WINDOW 0 -37 68 Left 2 WINDOW 3 -77 7 Left 2 SYMATTR InstName C6 SYMATTR Value 1000p SYMBOL ind2 -448 -48 M0 WINDOW 0 -37 15 Left 2 WINDOW 3 -77 56 Left 2 SYMATTR InstName L2 SYMATTR Value 1.3m SYMBOL Misc\\EuropeanResistor 1360 352 R0 SYMATTR InstName R9 SYMATTR Value 50 SYMBOL Misc\\EuropeanResistor 384 80 R0 SYMATTR InstName R10 SYMATTR Value 3k SYMBOL Misc\\EuropeanResistor 384 352 R0 SYMATTR InstName R11 SYMATTR Value 10k SYMBOL cap 368 272 R90 WINDOW 0 53 5 VBottom 2 WINDOW 3 58 9 VTop 2 SYMATTR InstName C7 SYMATTR Value 100n SYMBOL njf 208 192 R0 WINDOW 0 75 13 Left 2 WINDOW 3 72 43 Left 2 SYMATTR InstName J1 SYMATTR Value J310 SYMBOL Misc\\EuropeanResistor 528 272 R90 WINDOW 0 5 56 VBottom 2 WINDOW 3 27 56 VTop 2 SYMATTR InstName R12 SYMATTR Value 47 SYMBOL voltage -816 352 R0 WINDOW 0 43 39 Left 2 WINDOW 3 42 95 Left 2 WINDOW 123 42 151 Left 2 WINDOW 39 42 179 Left 2 SYMATTR InstName V1 SYMATTR Value "" SYMATTR Value2 AC 1 SYMBOL Misc\\EuropeanResistor -320 112 R90 WINDOW 0 5 56 VBottom 2 WINDOW 3 27 60 VTop 2 SYMATTR InstName R17 SYMATTR Value 0 SYMBOL Misc\\EuropeanResistor -832 160 R0 SYMATTR InstName R6 SYMATTR Value 1.5Meg SYMBOL cap -352 -128 R180 WINDOW 0 -50 60 Left 2 WINDOW 3 -57 23 Left 2 SYMATTR InstName C9 SYMATTR Value 100n SYMBOL cap -272 416 R180 WINDOW 0 -37 68 Left 2 WINDOW 3 -77 7 Left 2 SYMATTR InstName C3 SYMATTR Value 165p SYMBOL ind2 -448 304 M0 WINDOW 0 -37 15 Left 2 WINDOW 3 -77 56 Left 2 SYMATTR InstName L1 SYMATTR Value 678u SYMBOL Misc\\EuropeanResistor -320 464 R90 WINDOW 0 5 56 VBottom 2 WINDOW 3 27 60 VTop 2 SYMATTR InstName R7 SYMATTR Value 0 TEXT 792 840 Left 2 ;Designed and Simulated by 7L1RLL TEXT 776 616 Left 2 ;1. All capacitances are in Falad and all resistors are in Ohm unless otherwise noted. TEXT 784 776 Left 2 ;135kHz_472kHz_Active Antenna Schematic Drawing TEXT 712 616 Left 2 ;Note TEXT 792 896 Left 2 ;Initial Released : 16 April 2021 TEXT 1088 -48 Left 2 ;Power Feed Unit TEXT 288 -48 Left 2 ;Active Antenna Probe TEXT 776 656 Left 2 ;2. Resisiters R6, R7, R9 and R17 are for simulation purpose. TEXT -744 696 Left 2 !.model J310 NJF(Beta=3.384m Betatce=-0.5 Vto=-3.409 Vtotc=-2.5m Lambda=17m Is=193.9f Xti=3 Isr=1881f\n+ Nr=2 Alpha=7.533u N=1 Rd=1 Rs=1 Cgd=6.2p Cgs=6.2p Fc=0.5 Vk=74.1 M=465m Pb=1 Kf=46340f Af=1\n+ Mfg=Linear_Systems) TEXT -744 784 Left 2 !.model 2N5109 NPN ( BF=44 VAF=160 VAR=16 RC=0.69 RB=1.57 RE=2.75 IKF=0.28 ISE=0.36E-13 TF=0.111n\n+ TR=8n ITF=0.82E-01 VTF=0.66E+01 CJC=3p CJE=2p XTI=3.0 NE=1.5 ISC=0.12E-13 EG=1.11 XTB=1.5\n+ BR=1.14 VJC=0.75 VJE=0.75 IS=0.40E-14 MJC=0.33 MJE=0.33 XTF=4 IKR=0.28 KF=1f NC=1.7 FC=0.5\n+ RBM=1.1 IRB=0.40E-01 XCJC=0.5 mfg=Motorola) TEXT 944 376 Left 2 ;Coaxial cable TEXT -736 896 Left 2 !.ac lin 500 50k 500k TEXT -736 928 Left 2 !.MEAS AC tmp MAX mag(V(out)) TEXT -736 960 Left 2 !.MEAS AC fo when mag(V(out2))=tmp TEXT -736 992 Left 2 !.MEAS AC BW trig mag(V(out2))=tmp/sqrt(2) rise=1 targ mag(V(out2))=tmp/sqrt(2) fall=last TEXT -568 232 Left 2 ;476kHz TEXT -584 -128 Left 2 ;136.5kHz TEXT 784 712 Left 2 ;3. Inductor L1 can be replaced by IFT 455kHz without internal capacitor.