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I am surprised by the voltage waveforms from my DRSSTC secondary. I've attached a small antenna to my scope and looked at the voltages it picks up. At small bus voltages, i.e. stremaers of about 5" length, I get a smooth ramp up. At larger voltages, i.e. streamers of about 20" length, the voltage ramps up to a certain point and then drops. I am sure, that there are no ground arcs. Below are 2 images, one at low voltage and one at the higher one. I expected the streamer load to rise continuously with higher voltage. Have any of you seen similar behaviours?
Thank you for your reply. Likely my coil gets out of tune for longer streamers. I am just surprised, that the inset of capacitive streamer loading, which untunes my coil, happens so suddenly. I will experiment with tuning.
To my knowledge, although, secondary voltages and primary currents are different animals. When getting out of tune, secondary voltage decreases, while primary currents increase. This suggests, that in the link you supplied, that coil gets into tune with longer streamers, while mine out of it.
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Streamer loading
