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Last week the NY Times ran a typical
puff-piece article about BPL which looked to be assembled out of FCC handouts and industry white papers. Over the weekend they had a sort-of correction tacked on to an un-related article (don't remember which one and I don't have the paper handy). The gist was that the FCC/industry had taken note of the ARRL objections and required suppression of interference in what they termed something like "critical" bands (again, don't remember the exact phrase) - touted as a victory of government and industry, cooperating to solve a problem, blah blah blah. Load of crap. Oz Brenda Ann Dyer wrote: "Mark Keith" wrote in message om... Also, I'm dubious that "notching" can really work. Both for us, and them. Notching didn't work in Japan, and Japan shut down all their BPL. Reason being, you're dealing with square waves over several octaves of spectrum. As anyone familiar with square waves knows, they are very rich in harmonic output, and the first, third and fifth harmonics are not much less in power than the fundamental. If they notch out 40m, you'll just get to hear the third harmonic from 2.3MHz, and so on up the spectrum. |
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