Version 4
SHEET 1 880 680
WIRE -48 16 -80 16
WIRE 48 16 -48 16
WIRE 144 16 128 16
WIRE 160 16 144 16
WIRE 336 16 240 16
WIRE -80 32 -80 16
WIRE 336 32 336 16
WIRE -80 128 -80 112
WIRE 48 128 0 128
WIRE 96 128 48 128
WIRE 144 128 144 16
WIRE 224 128 144 128
WIRE 0 160 0 128
WIRE 144 160 144 128
WIRE 224 160 224 128
WIRE 336 160 336 128
WIRE 96 176 96 128
WIRE 0 256 0 240
WIRE 96 256 96 224
WIRE 144 256 144 240
WIRE 224 256 224 224
WIRE 336 256 336 240
FLAG 144 256 0
FLAG 96 256 0
FLAG -48 16 Vcc
FLAG 48 128 Vsig
FLAG -80 128 0
FLAG 0 256 0
FLAG 336 256 0
FLAG 224 256 0
SYMBOL ind2 32 32 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 4 56 VBottom 0
SYMATTR InstName L1
SYMATTR Value 5m
SYMATTR Type ind
SYMATTR SpiceLine Rser=3 Rpar=1k Cpar=5n
SYMBOL ind2 256 32 M270
WINDOW 0 32 56 VTop 0
WINDOW 3 4 56 VBottom 0
SYMATTR InstName L2
SYMATTR Value 50
SYMATTR Type ind
SYMATTR SpiceLine Rser=3k Rpar=4e6 Cpar=1p
SYMBOL sw 144 256 M180
SYMATTR InstName S1
SYMBOL voltage -80 16 M0
WINDOW 123 0 0 Left 0
WINDOW 39 -41 148 Left 0
SYMATTR SpiceLine Rser=10m Cpar=10u
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL res 320 144 R0
SYMATTR InstName R1
SYMATTR Value 1
SYMBOL Misc\\neonbulb 336 80 R0
WINDOW 3 17 56 Left 0
SYMATTR Value Spark_Gap
SYMATTR InstName U1
SYMATTR Value2 ""
SYMATTR SpiceModel ""
SYMATTR SpiceLine ""
SYMATTR SpiceLine2 ""
SYMBOL cap 208 160 R0
SYMATTR InstName C1
SYMATTR Value 0µ2
SYMBOL voltage 0 144 R0
WINDOW 3 -113 148 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(0 12 1u 19u 10u 4m 6m)
SYMATTR InstName V2
TEXT -200 360 Left 0 !.tran 0 100m 80m
TEXT -200 328 Left 0 !.model SW SW(Ron=10m Roff=1e6 Vt=6 Vh=-2)
TEXT 144 -40 Center 0 !K1 L1 L2 .9
TEXT -192 -296 Left 0 !.subckt spark_gap 1 4\nR_off 1 2 1e7 ; dark resistance (affects breakdown voltage)\nR_ion 1 2 R=10/V(ion)**.75 ; dynamic ionization resistance\nDfall 2 3 10V ; bidirectional cathode fall voltage\nCdfall 2 3 50p Rser=100 ; for convergence\nV_ion 3 4 0 ; current sense for behavioral sources\nB_ion 0 ion I=I(V_ion)**2 ; measure of channel ionization\nC_ion ion 0 5u Rpar=1 ; ionization time constant\n.model 10V d(Vfwd=10 Vrev=10 Ron=1)\n.ends spark_gap