*version 8.0 2490902151
u 1014
V? 13
TX? 2
R? 17
? 27
L? 2
C? 4
S? 4
U? 51
ABS? 2
INTEG? 4
GLIMIT? 5
LIMIT? 4
X? 2
MULT? 2
@libraries
@analysis
.TRAN 1 0 1 0
+0 100us
+1 1s
+3 100us
.OPT 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
DIGIOLVL 1
.OP 0 
@targets
@attributes
@translators
a 0 u 13 0 0 0 hln 100 TANGO=PCB
a 0 u 13 0 0 0 hln 100 SCICARDS=PCB
a 0 u 13 0 0 0 hln 100 PROTEL=PCB
a 0 u 13 0 0 0 hln 100 PCBOARDS=PCB
a 0 u 13 0 0 0 hln 100 PCAD=PCB
a 0 u 13 0 0 0 hln 100 PADS=PCB
a 0 u 13 0 0 0 hln 100 ORCAD=PCB
a 0 u 13 0 0 0 hln 100 EDIF=PCB
a 0 u 13 0 0 0 hln 100 CADSTAR=PCB
a 0 u 13 0 0 0 hln 100 PSPICE=PSPICE
a 0 u 13 0 0 0 hln 100 XILINX=XILINX
@setup
unconnectedPins 0
connectViaLabel 0
connectViaLocalLabels 0
NoStim4ExtIFPortsWarnings 1
AutoGenStim4ExtIFPorts 1
@index
pageloc 1 0 6063 
@status
n 0 99:09:19:20:28:05;940361285 e 
s 2833 99:09:19:20:28:41;940361321 e 
c 99:09:20:22:40:45;940455645
*page 1 0 970 720 iA
@ports
port 67 AGND 250 270 h
port 760 +5V 570 250 h
a 1 s 3 0 10 2 hcn 100 LABEL=+5v
port 12 AGND 120 270 h
port 640 AGND 290 310 h
port 622 AGND 360 310 h
@parts
part 830 LIMIT 430 190 h
a 0 u 13 0 14 8 hln 100 HI=5
a 0 sp 0 0 14 48 hln 100 PART=LIMIT
a 0 a 0:13 0 0 0 hln 100 PKGREF=LIMIT2
a 0 ap 0 0 -12 -2 hln 100 REFDES=LIMIT2
part 403 ABS 310 190 h
a 0 sp 11 0 20 12 hln 100 PART=ABS
a 0 a 0:13 0 0 0 hln 100 PKGREF=ABS1
a 0 ap 0 0 -12 -2 hln 100 REFDES=ABS1
part 55 L 140 190 h
a 0 u 13 0 15 25 hln 100 VALUE=159H
a 0 sp 0 0 0 10 hlb 100 PART=L
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=L2012C
a 0 s 0:13 0 0 0 hln 100 GATE=
a 0 a 0:13 0 0 0 hln 100 PKGREF=L1
a 0 ap 9 0 15 0 hln 100 REFDES=L1
part 2 VSIN 120 200 h
a 1 u 0 0 0 0 hcn 100 PHASE=0
a 1 u 0 0 0 0 hcn 100 VOFF=0
a 0 a 0:13 0 0 0 hln 100 PKGREF=V1
a 1 ap 9 0 20 10 hcn 100 REFDES=V1
a 1 u 13 13 60 25 hcn 100 VAMPL=14142
a 1 u 0 0 0 0 hcn 100 FREQ=50
part 105 R 200 190 h
a 0 x 0:13 0 0 0 hln 100 PKGREF=R2
a 0 xp 9 0 15 0 hln 100 REFDES=R2
a 0 u 13 0 15 25 hln 100 VALUE=1000
a 0 sp 0 0 0 10 hlb 100 PART=R
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=RC05
a 0 s 0:13 0 0 0 hln 100 GATE=
part 617 Sbreak 350 280 H
a 0 x 0:13 0 0 0 hln 100 PKGREF=S1
a 0 xp 9 0 18 0 hln 100 REFDES=S1
a 0 u 0 0 0 20 hlb 100 RON=0.1
a 0 u 0 0 0 10 hlb 100 ROFF=1000Meg
a 0 u 0 0 0 30 hlb 100 VOFF=0.5
a 0 u 0 0 0 40 hlb 100 VON=1
part 678 vdc 380 190 v
a 0 sp 0 0 22 37 hln 100 PART=vdc
a 0 x 0:13 0 0 0 hln 100 PKGREF=V2
a 1 xp 9 0 -11 27 hcn 100 REFDES=V2
a 1 u 13 13 34 38 hcn 100 DC=20k
part 730 74123 520 150 h
a 0 sp 11 0 42 78 hln 100 PART=74123
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=DIP16
a 0 s 0:13 0 0 0 hln 100 GATE=A
a 0 a 0:13 0 0 0 hln 100 PKGREF=U45
a 1 ap 9 0 40 -2 hln 100 REFDES=U45A
a 0 u 0 0 0 0 hln 100 IO_LEVEL=3
a 0 u 13 13 0 125 hln 100 PULSE=100us
part 62 C 250 240 v
a 0 sp 0 0 0 10 hlb 100 PART=C
a 0 s 0:13 0 0 0 hln 100 PKGTYPE=CK05
a 0 s 0:13 0 0 0 hln 100 GATE=
a 0 a 0:13 0 0 0 hln 100 PKGREF=C1
a 0 ap 9 0 15 0 hln 100 REFDES=C1
a 0 u 13 0 10 50 hln 100 VALUE=50nF
part 1 titleblk 970 720 h
a 1 s 13 0 350 10 hcn 100 PAGESIZE=A
a 1 s 13 0 180 60 hcn 100 PAGETITLE=
a 1 s 13 0 340 95 hrn 100 PAGECOUNT=1
a 1 s 13 0 300 95 hrn 100 PAGENO=1
part 863 nodeMarker 130 190 h
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=L1:1
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 a 0 0 4 22 hlb 100 LABEL=24
part 604 nodeMarker 290 190 h
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=ABS1:IN
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=U42A:Q
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 s 0 0 0 0 hln 100 PROBEVAR=
a 0 a 0 0 4 22 hlb 100 LABEL=16
@conn
w 639
s 290 310 290 290 641
s 310 290 290 290 638
w 887
s 360 290 360 310 886
s 350 290 360 290 810
w 985
s 350 280 600 280 915
s 600 160 600 280 713
s 590 160 600 160 739
w 634
a 0 up 0:33 0 0 0 hln 100 V=
s 310 280 290 280 633
s 290 280 290 190 891
s 310 190 290 190 472
s 290 190 250 190 65
s 250 190 240 190 1005
s 250 210 250 190 63
w 939
s 130 190 140 190 981
s 120 190 130 190 980
a 0 up 0:33 0 105 189 hct 100 V=
s 120 200 120 190 8
w 5
a 0 up 0:33 0 0 0 hln 100 V=
s 120 270 120 240 113
a 0 up 0:33 0 122 260 hlt 100 V=
w 970
s 420 190 430 190 968
w 974
s 380 190 370 190 973
w 823
s 480 190 520 190 969
w 804
s 570 250 550 250 761
s 550 250 500 250 1010
s 550 250 550 220 763
s 500 180 500 250 869
s 500 180 520 180 828
w 69
a 0 up 0:33 0 0 0 hln 100 V=
s 250 270 250 240 112
a 0 up 0:33 0 252 260 hlt 100 V=
@junction
j 200 190
+ p 55 2
+ p 105 1
j 290 310
+ s 640
+ w 639
j 310 290
+ p 617 4
+ w 639
j 360 310
+ s 622
+ w 887
j 350 290
+ p 617 2
+ w 887
j 350 280
+ p 617 1
+ w 985
j 590 160
+ p 730 Q
+ w 985
j 310 280
+ p 617 3
+ w 634
j 290 190
+ p 604 pin1
+ w 634
j 310 190
+ p 403 IN
+ w 634
j 240 190
+ p 105 2
+ w 634
j 250 210
+ p 62 2
+ w 634
j 250 190
+ w 634
+ w 634
j 140 190
+ p 55 1
+ w 939
j 130 190
+ p 863 pin1
+ w 939
j 120 200
+ p 2 +
+ w 939
j 120 240
+ p 2 -
+ w 5
j 120 270
+ s 12
+ w 5
j 430 190
+ p 830 IN
+ w 970
j 420 190
+ p 678 -
+ w 970
j 370 190
+ p 403 OUT
+ w 974
j 380 190
+ p 678 +
+ w 974
j 480 190
+ p 830 OUT
+ w 823
j 520 190
+ p 730 B
+ w 823
j 570 250
+ s 760
+ w 804
j 550 220
+ p 730 \CLR\
+ w 804
j 550 250
+ w 804
+ w 804
j 520 180
+ p 730 A
+ w 804
j 250 240
+ p 62 1
+ w 69
j 250 270
+ s 67
+ w 69
@attributes
a 0 s 0:13 0 0 0 hln 100 PAGETITLE=
a 0 s 0:13 0 0 0 hln 100 PAGENO=1
a 0 s 0:13 0 0 0 hln 100 PAGESIZE=A
a 0 s 0:13 0 0 0 hln 100 PAGECOUNT=1
@graphics
t 992 t 5 282 220 260 200 0 2
Cp
t 993 t 5 350 144 447 162 0 17
Breakdown voltage
t 1013 t 5 120 124 248 142 0 23
Supply: 10kv/200mA/50Hz
t 983 t 5 120 24 560 120 0 362
STATIC SPARK GAP SIMULATION

The breakdown voltage of the static gap is initially 20kV,  and can be changed by altering the DC parameter for source V2.  U45A is a one-shot timer,  which mimics the firing and quenching of the spark gap.  Initially the normal o/c tranformer voltage is shown as well as the tank capacitor voltage waveform.
Press F11 to RUN now.