Hi Dave,Measuring across the rotary gap using a compensated divider and a CT, I found the effective impedance of the gap to be about 0.65ohm at 4200A[pk.] This was on the 120L50K coil, before I reconfigured the primary circuit for a higher Zchar. The voltage drop waveform showed some non-linearity, as one might expect.
Here's a desc of the 120L coil: http://www.lod.org/Projects/120L50K/120L50K.html
By comparison, the 4500V silicon switches in the 90L10K prototype coils exhibit an effective impedance of about 0.005ohm, at 4350A[pk.] GL
David N. Van Doren wrote: Does anyone have any data on spark gap resistance? and for that matter Streamer impedance? I've been doing some simulations, and for the lack of any better number I've been using 4 ohms for spark gap R's and have tried using 220kohm+1.5pf'/ft for streamers, but doesn't always seem to look right in the sims. Trying to characterize plasma is always difficult at best. Thanks Dave
_______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla