Commander John crazytvjohn at yahoo.com
Wed Dec 6 20:12:33 EST 2006

Hi all
  Last evening about 9pm I noticed numerous  Time Warner cable TV service trucks on my street, flashing lights and all.   Line men up on ladders at the utility poles, all up and down the block.  After a while a knock on the door.  The lineman wanted to know if I was a ham and if I was talking at about 6pm or so.
  I said I was and they told me they were experiencing interference problems and wanted to run some tests.  So I transmitted and It was confirmed.  My being on the air shut down a entire node of roadrunner cable internet service.  The lineman said some 200 were affected.  nice.
  This was on 3.967MC.  at 1500 watts.  They ran some more tests, disconnecting my cable TV drop to isolate me from the system.  No noticeable change. We found that at 30 watts they can tell when it is keyed on and off but no one is kicked off the internet.  The tech said It was not back feeding from my house but maybe the neighbors or the line.  On Saturday they plan to return wanting my cooperation to allow them to drop houses one at a time until they find the cause.  They claim they have been looking for this intermittent problem for about a month. When they get to the complaining home they find no problem.  I just don't talk that much.
  At my home there is no interference, cable TV is clear.   My computer sitting next to the commander runs RTTY with the DSL internet on and stable.  I'm glad I can't afford road runner.  They begged me not to transmitt until Saturday.  I find this all very interesting, and can hardly wait until the problem is found.  Anyone have experience with these cable internet nodes ?  I don't have much experience with cable internet interference.  Mine was the air conditioner fan turning on and off, while the garage door open itself up.  All cleared up long ago.
  john w9zy
  I will post again when I learn more about this.

More information about the RFI mailing list