QSpice

Is anyone using QSpice yet and if so can they tell me why a simulation of this simple jfet astable looks different in QSpice?

In LTSpice the simulated cycles (when it starts after about 40 seconds) look fine at the drain of each FET and repeat almost
exactly.

With exactly the same circuit in QSpice there seems to be some kind of simulation granularity issue.
Maybe there's a simulation parameter I need to adjust.

I'll try posting the QSpice schematic if anyone is interested but not sure how successful that will be.

QSpice includes the UF3C170400K3S which may be of use to those people wanting to simulate similar things.

Version 4.1
SHEET 1 1396 772
WIRE -16 -512 -240 -512
WIRE 496 -512 -16 -512
WIRE -16 -432 -16 -512
WIRE 496 -432 496 -512
WIRE -16 -272 -16 -352
WIRE 32 -272 -16 -272
WIRE 64 -272 32 -272
WIRE 176 -272 128 -272
WIRE 352 -272 304 -272
WIRE 496 -272 496 -352
WIRE 496 -272 416 -272
WIRE -240 -256 -240 -512
WIRE -16 -192 -16 -272
WIRE 496 -192 496 -272
WIRE 176 -128 304 -272
WIRE 176 -128 32 -128
WIRE 304 -128 176 -272
WIRE 448 -128 304 -128
WIRE 176 16 176 -128
WIRE 304 16 304 -128
WIRE -16 32 -16 -96
WIRE 496 32 496 -96
WIRE -240 208 -240 -176
WIRE -16 208 -16 112
WIRE -16 208 -240 208
WIRE 176 208 176 96
WIRE 176 208 -16 208
WIRE 304 208 304 96
WIRE 304 208 176 208
WIRE 496 208 496 112
WIRE 496 208 304 208
WIRE -240 240 -240 208
FLAG -240 240 0
FLAG 32 -272 D1
SYMBOL njf 448 -192 R0
WINDOW 0 0 -11 Left 2
WINDOW 3 -59 98 Left 2
SYMATTR InstName J1
SYMATTR Value 2N3819
SYMBOL njf 32 -192 M0
WINDOW 0 7 -9 Left 2
WINDOW 3 -64 100 Left 2
SYMATTR InstName J2
SYMATTR Value 2N3819
SYMBOL res -32 -448 R0
SYMATTR InstName R1
SYMATTR Value 3.3k
SYMBOL res 480 -448 R0
SYMATTR InstName R2
SYMATTR Value 3.3k
SYMBOL voltage -240 -272 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL res 480 16 R0
SYMATTR InstName R7
SYMATTR Value 1k
SYMBOL res -32 16 R0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL res 160 0 R0
SYMATTR InstName R4
SYMATTR Value 10Meg
SYMBOL res 288 0 R0
SYMATTR InstName R5
SYMATTR Value 10Meg
SYMBOL cap 128 -288 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL cap 416 -288 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value 100n
TEXT -200 240 Left 2 !.tran 100