Notice the huge difference in the quality of the spark.
Notice the multiple spark gap: Tesla said you could use this instead of the
magnet disrupter type. Doesn't seem to improve AC operation. Must be
used with DC. Notice the giant 10 to 20 henry choke to power the primary cap. I think this is to simulate using an actual DC generator. Notice the giant resisters. I think this is to slow down the charging of the primary capacitor. Tesla said it shouldn't be charged too fast or an arc will form instead of a pulse. Roger said the unit won't work without the big choke
and the resisters. Both are needed. Comments?

YouTube - Small DC Tesla Coil 1

Compare to cover of Secrets of Cold Electricity. White flimmering but I don't see the blue dartlets. Is there radiant energy at work here?