There is another schematic, from 2006, uploaded by Helmut Sennewald, which also claims to use a step recovery diode.? The diode model in that circuit is an "ordinary" SPICE diode using a .MODEL statement:
.model SMMD840 D(Is=500f N=1.3 Rs=0.22 Eg=1.12 Cjo=1.3p M=0.235 VJ=0.5 Bv=15 Ibv=10u Tt=10n)
I can not confirm any of these models.? I just present them as evidence of what other LTspice users did.
Andy
