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Don't know about BPL, but VDSL goes from 138KHz to 12MHz and has 4096 tones. Not as much potential for a problem, as it's all twisted pair rather than power lines.
Frank Dresser wrote: "Walter Treftz" wrote in message ... Here's what we do --- we built a (legal) KW rig into a van, install a vertical- radiating antenna, cut out the roof and replace it with a fiberglass sheet. Drive directly underneath a power line with BPL running. Run lots of QSO's, and have at it. We're legal. Induced RF just might make them think twice about it. Yes, I know Ashcrofts boys are reading this --- Hi, muthers -- I live at the callbook address. Bring some beer when you come visiting. N4GL Do you mean the way CBers made channel 5 unwatchable 25 years ago? I don't know much about BPL, but I think the TV analogy might hold. Given the bandwidth of BPL, there must be dozens, maybe hundreds of channels on the powerline. Can every one, or most of them, be wiped out? I'm thinking somebody came up with some pretty robust ways to deal with interference. But what if it does stop BPL? BPL isn't being backed because it's a technically elegant system. It's being backed by politics. Rural areas were critically important in the last Presidential election, and any candidiate would love to say something like "MY OPPONENT IS STOPPING ONE FORM OF HIGH SPEED INTERNET DISTRIBUTION ON BEHALF OF HIS PALS IN THE TELECOMMUNCATIONS INDUSTRY, BUT I PROMISE TO BRING IT IN, RIGHT ON YOUR POWER LINE, AS SOON AS I'M ELECTED!!" Of course, that would be a political misrepresentation, but politicans get away with worse every day. Politics turns into a numbers game. How many politicians or bureaucrats are saying anything negative about this goofy scheme? Politicians may not know physics, but they do know how to count. Frank Dresser |
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