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Title: How Did We Miss This? Post by: Steve - WB3HUZ on June 23, 2008, 11:16:03 PM http://www.arrl.org/news/stories/2008/04/25/10064/?nc=1
Title: Re: How Did We Miss This? Post by: Pete, WA2CWA on June 23, 2008, 11:32:08 PM I saw it; read it; and yelled YAY! and applauded
Can't remember why I chose not to post it here. Title: Re: How Did We Miss This? Post by: Carl WA1KPD on June 24, 2008, 12:18:42 AM Go team!!
My dues paid off again. Title: Re: How Did We Miss This? Post by: Opcom on June 24, 2008, 12:25:07 AM I figured all you guys read the ARRL news.. Note the mention of Dallas TX and the "power line testing equipment" or whatever.
I tell ya what is messing me up in some cases -the DART electric rail. miles of wire, and the switchmode controllers in the trains.. It is just like a giant electric train set. I know because the "AC adapter" is a couple blocks away in a small building. The transformer is an open core affair about 12 feet long, 8 feet tall, and 3 feet deep. Anyway, telemetry is sent on the wires as a series of tones that repeat rapidly over and over. The pitch of each tone to represent the value of the information. The caucauphony be heard by putting the car's AM radio to 910AM, and it interferes with the station rather nicely. Title: Re: How Did We Miss This? Post by: Jim, W5JO on June 24, 2008, 08:39:03 AM I tell ya what is messing me up in some cases -the DART electric rail. miles of wire, and the switchmode controllers in the trains.. It is just like a giant electric train set. I know because the "AC adapter" is a couple blocks away in a small building. The transformer is an open core affair about 12 feet long, 8 feet tall, and 3 feet deep. Anyway, telemetry is sent on the wires as a series of tones that repeat rapidly over and over. The pitch of each tone to represent the value of the information. The caucauphony be heard by putting the car's AM radio to 910AM, and it interferes with the station rather nicely. Have you complained about it? Title: Re: How Did We Miss This? Post by: k4kyv on June 24, 2008, 11:15:55 PM I tell ya what is messing me up in some cases -the DART electric rail. miles of wire, and the switchmode controllers in the trains.. It is just like a giant electric train set. I know because the "AC adapter" is a couple blocks away in a small building. The transformer is an open core affair about 12 feet long, 8 feet tall, and 3 feet deep. Anyway, telemetry is sent on the wires as a series of tones that repeat rapidly over and over. The pitch of each tone to represent the value of the information. The caucauphony be heard by putting the car's AM radio to 910AM, and it interferes with the station rather nicely. Have you complained about it? I just got back from a trip to Dallas this past week. I used both the Trinity Railway Express and DART. I was impressed by the cleanliness and efficiency of both systems (except for the fact that TRE, the one you take to the airport, doesn't run on Sundays). If those signals are causing problems in the broadcast band at 910 kc/s, what about 160m at 1820, the second harmonic? Sounds like something that could be easily fixed if someone complained, particularly if the FeeCee became involved. It is a new system, just beginning to get good ridership particularly with current gas prices, so I doubt they would want any bad press right now. Title: Re: How Did We Miss This? Post by: w3jn on June 25, 2008, 07:42:16 AM I think this was being discussed here a short time ago
http://amfone.net/Amforum/index.php?topic=15886.0 Title: Re: How Did We Miss This? Post by: Opcom on June 25, 2008, 11:39:18 PM It is intermod in my car radio. I have been so far unable to prove it is the rail system on any frequency of interest. I may have to do some more testing.
Title: Re: How Did We Miss This? Post by: AB9IL on July 13, 2008, 09:41:21 PM Good news.
The sooner BPL is buried, the sooner the United States can get on with real no BS broadband. The FCC was way out of line advocating that inferior BPL technology. Title: Re: How Did We Miss This? Post by: Jim, W5JO on July 13, 2008, 09:45:29 PM Good news. The sooner BPL is buried, the sooner the United States can get on with real no BS broadband. The FCC was way out of line advocating that inferior BPL technology. Thank god and greyhound that guy is gone. |