On Mon, 06 Feb 2012 12:48:28 +0000, Bill Wright
wrote:

Don Pearce wrote:

I don't think anybody ever passed a law that said interference could
only make the signal go upwards. In both video polarities there are
black and white fishes. The white ones dominate visually.

d

So why were we told that one of the great advantages of 625 was that the
interference would be black?

Probably a marketing person.

d