Version 4
SHEET 1 880 680
WIRE -464 -32 -480 -32
WIRE -400 -32 -464 -32
WIRE -256 -32 -320 -32
WIRE -240 -32 -256 -32
WIRE -240 0 -240 -32
WIRE -480 16 -480 -32
WIRE -480 128 -480 96
WIRE -240 128 -240 96
FLAG -240 128 0
FLAG -480 128 0
FLAG -464 -32 1
FLAG -256 -32 2
SYMBOL Misc\\neonbulb -240 48 R0
WINDOW 3 17 56 Left 0
SYMATTR InstName U1
SYMATTR Value2 ""
SYMATTR SpiceModel ""
SYMATTR SpiceLine ""
SYMATTR SpiceLine2 ""
SYMATTR Value Spark_Gap
SYMBOL voltage -480 0 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value SINE(0 300 100k)
SYMBOL res -304 -48 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R1
SYMATTR Value 10
TEXT -536 224 Left 0 !.subckt spark_gap 1 4\nR_off 1 2 1e6 ; 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\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 190n Rpar=1 ; ionization time constant\n.model 10V d(Vfwd=10 Vrev=10 Ron=10m)\n.ends spark_gap
TEXT -536 160 Left 0 !.tran 0 20u 0 50n