Sixth Attempt at Toroid Circuit
.WIDTH IN=78 OUT=78
* cable model (BELDEN 8233)...
* r=1.6e-3 ohm/foot
* c=17.3   pf/foot
* l=97     nH/foot
* length = 500 feet
*.model lcable ltra r=1.6e-3 l=97nH c=17.3pF len=500

* cable model (BELDEN 9222)...
* r=9.5e-3 ohm/foot
* c=30.8   pf/foot
* l=77     nH/foot
* length = 500 feet
*.model lcable ltra r=9.5e-3 l=77nH c=30.8pF len=500 

* cable model (BELDEN 9888)...
* r=1.2e-3 ohm/foot
* c=26.0   pf/foot
* l=65     nH/foot
* length = 500 feet
.model lcable ltra r=1.2e-3 l=65nH c=26.0pF len=500 rel=2

*Vsine 0 37 sin(250uV 250uV 200Hz -3750us 0) dc 0
*Vup 0 38 pulse(0 -1 0 0.5ns 0.5ns 4999999ns 20ms) dc 0
*Bin 0 1 V=V(37)*V(38)
*I1 0 1 PWL(0,0, 0.0001mS,4.0mA, 1.9999mS,4.0mA, 2.0001mS,0) DC 0
*V1 1 0 PWL(0,0, 0.0001uS,200mV, 0.9999uS,200mV, 1.0001uS,0) DC 0
*V1 1 0 PULSE(0 200mV 0.0 0.5nS 0.5nS 1uS 100mS) DC 0
*Vping 1 0 PULSE(0 4V 0.0 0.5nS 0.5nS 1.2uS 500mS) DC 0
*Vbucket 0 39 PULSE(0 250mV 0.0 0.5nS 0.5nS 3.5nS 18.8nS) DC 0
Vpenvl 37 0 sin(0.05 0.05 265.9574468Hz -2.82ms 0) dc 0
Vup 38 0 pulse(0 1V 0 5us 5us 3.760ms .5s) dc 0
*Vbucket 39 0 PULSE(0 200mV 0.0 0.5nS 0.5nS 3.5nS 18.8nS) DC 0
*Vspike 40 0 pulse(0 2V 282ns 0.5ns 0.5ns 94ns .5s) DC 0
*Bin 1 0 V=V(37)*V(38)*V(39)+V(39)*V(40)
Bin 1 0 V=V(37)*V(38)
*Vgen 1 0 AC 1
R1 1 2 1m
RT 4 0 50
ctloop 3 0 18.8pF
*ktor lbeam ltor 0.83333
*lbeam 3 4 500uH
*ltor 5 6 1.88H
* value for toroid A after fit: ltor=1.055H, ctor 122pF
*ltor 5 6 1.055H
*ctor 5 6 122pF
* value for toroid B after fit: ltor=.229H, ctor 52pF
ktor lbeam ltor 0.5142
lbeam 3 4 500uH
ltor 5 6 .229H
ctor 5 6 52pF
*RC 4 6 100G
Rpre 5 7 1
ocable 7 6 8 0 lcable
Rsh 6 0 0.8
*RT2 8 9 50
*Einteg 11 0 10 0 1.0
*Cshape 11 9 40nF
*RT3 11 0 1MEG
Vl1 2 3 DC 0
Vl2 8 10 DC 0


Rsubst 10 62 0.001  
*L1 10 62 100nH
*C1 62 0 800pF
R1a 62 0 50
Rshort 62 63 0.001
C2 62 63 1uF
R2 63 64 1k
R4 64 0 10K
E1 66 0 64 65 1800000
R3 65 0 1K
R5 66 65 10K 
*R6 66 0 500
Rshort2 66 67 0.001
C3 66 67 1uF
R7 67 68 1K
R9 68 0 10K
E2 610 0 68 69 1800000
R8 69 0 1K
R10 610 69 10K
R11 610 626 1
C4 626 611 150uF
*Rshort3 610 611 0.001
R13 611 612 500
E5 613 0 0 612 1800000
R14 613 612 9.09K
R40 613 642 1K
RTsig 642 0 1MEG
R15 613 615 10K
R16 615 0 10K
E7 617 0 615 616 1800000
R18 617 616 10K
R19 617 618 150K
R31 618 619 0.001
E9 621 0 620 619 1800000
C5 621 619 3000pF
R33 620 0 100
R34 621 622 1MEG
E10 623 0 0 622 1800000
C6 622 623 100nF
R32 623 620 1MEG
R35 621 624 10K
R36 624 0 10K
R37 621 625 1K
RTinteg 625 0 1MEG

*.ac dec 100 1MEG 100G
.tran  5us 10mS 0S 5us
*.plot v(4)
*.ac dec 10  10
*.plot tran  v(2) i(vin)
*.plot ac  vdb(2) xlog
.subckt tcable 1 2 3 4
Ra 1 3 0.1
Rb 2 4 0.1 
Ca 3 4 20pF
*t1 1 2 3 4 z0=50 td=10ns
*t2 2 0 4 0 z0=50 td=10ns
.ends tcable
.probe
.end