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Re: Beading caught on film.
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- Subject: Re: Beading caught on film.
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Wed, 04 May 2005 17:35:49 -0600
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Original poster: "Mike" <induction@xxxxxxxxxxx>
Interesting arc related question. I've read that with DC
welding in certain systems, the cathode runs something like 1/3 hot
compared to the anode, at 2/3 hot. Current direction flow issue I guess.
I know if I draw an arc in the discharge tube, even 6 feet long, I can get
the Stainless base to show Blue staining when I access it again but never
see this in the top electrode. The top is usually negative, the base is
usually positive and grounded.
Do you notice this in DC only?
----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
Sent: Wednesday, May 04, 2005 1:13 PM
Subject: Re: Beading caught on film.
Original poster: "Gerald Reynolds" <gerryreynolds@xxxxxxxxxxxxx>
I think it is a picture just before you burned your house down :-))
Seriously, when I draw a power arc to a grounded object, there always
seems to be a segment of the arc near the grounded object that is twice as
bright as the rest of the arc. Any ideas on what that might be and could
this be the same phenominum??? What are beads (in the airplane
picture)??? I havent heard this term before.
Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>
I may have seen one little bead shown here:
It is at the very end of the streamer. I thought it might just be some
tiny flying bug that bought the big one, or a flake of dust burning up.
It was a pretty hot arc that the camera sort of missed. But the little
bright spot sure seems odd. I pulled the high res original and this is
what it looks like as close as the pixels allow:
But I don't seem to see them much with the eye. I wonder if it is some
long time frame effect???
Don't know what it is...