Version 4
SHEET 1 880 680
WIRE -176 208 -176 112
WIRE -176 384 -176 288
WIRE -176 416 -176 384
WIRE -112 112 -176 112
WIRE 16 112 -32 112
WIRE 16 192 16 112
WIRE 16 384 -176 384
WIRE 16 384 16 288
FLAG -176 416 0
SYMBOL SimpleSparkGap 16 240 R0
SYMATTR Value2 Roff=1k Ron=1 Vbd=100 Isus=1
SYMATTR InstName U1
SYMBOL voltage -176 192 R0
WINDOW 3 -30 272 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value PWL(0 0 1 150 3 -150 4 0)
SYMBOL res -128 128 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 0 56 VBottom 0
SYMATTR InstName R1
SYMATTR Value 10
TEXT -210 506 Left 0 !.tran 0 4 0 2m