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.
