Spark length vs. sharp points

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Kennan C Herrick by way of Terry Fritz <twftesla-at-uswest-dot-net>" <kcha1-at-juno-dot-com>

In a recent posting I described how a sharp break-out point diminished
the secondary's E-field voltage by only 1/2.  It ain't necessarily so.

The sharp point I used stuck out from the (smooth) toroid only a few
inches.  When I substituted a point sticking out 15" or so (just the end
of a piece of 1/16" straight "music wire") I found that the E-field
amplitude diminished much more: to perhaps 30% of that when the discharge
was from the toroid.

So the field of the toroid has a considerable effect, for a considerable
distance, on the discharge from associated points.

Ken Herrick
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