Re: plating xmas balls

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

Original poster: robert & june heidlebaugh <rheidlebaugh-at-desertgate-dot-com> 

Two thoughts. 1, you can plate copper to conductive paint then any metal to
the copper. 2, I thought the TC streamers were AC not dc current and tend to
reduce ion flow to a target. Yes some erosion dose happen but only slightly.
Robert   H
-- 


 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > Date: Fri, 12 Dec 2003 12:24:26 -0700
 > To: tesla-at-pupman-dot-com
 > Subject: Re: plating xmas balls
 > Resent-From: tesla-at-pupman-dot-com
 > Resent-Date: Fri, 12 Dec 2003 12:32:14 -0700
 >
 > Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net>
 >
 > is the side getting "whacked by the electrons" the positive or negative
 > side?  Recall that current flows from positive to negative, but the
 > electrons actually flow from negative to positive (thank you Ben Franklin...
 > two ways to define it, and happened to pick the wrong one!)
 >
 > But, in any case, the transfer of material from one side to the other of a
 > DC gap is a well known phenomenon... Same thing occurs on DC switches, or,
 > for example, ignition points in a standard Kettering ignition, when the
 > "condensor" (capacitor) is the wrong value.
 >
 > If I were to make some random surmises, rather than going down the hall and
 > actually getting the book that talks about this, think of this.  Arcs are
 > characterized by having a distinct "cathode spot" (or spots, depending on
 > current) where as the anode is more diffuse.  The temperature distribution
 > on the electrodes is very different.  The voltage distribution along the arc
 > is also not even, so the heat dissipation will vary.
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Friday, December 12, 2003 6:56 AM
 > Subject: Re: plating xmas balls
 >
 >
 >> Original poster: Ian Macky <ian.macky-at-oracle-dot-com>
 >>
 >>> Original poster: "Antonio Carlos M. de Queiroz" <acmq-at-compuland-dot-com.br>
 >>> I have never heard about this. Since it's the air that gets hot, and
 >>> the currents in the terminals are identical, why would one of the
 >>> terminals get hotter? DC sparks are assymmetrical in appearance, but
 >>> the current looks very uniform.
 >>
 >> i was taught at a national-level school so i can guarantee those
 >> figures.  welders are a very practical lot, and much of welding data
 >> was arrived at through empirical means with no model backing it up.
 >>
 >> all i know is, in a DC arc, the side getting whacked by the electrons
 >> gets more heat.  could there be a kinetic component?  most of the heat
 >> goes into the electrode and material being welded, not into the air.
 >>
 >> --ian
 >>
 >>
 >
 >