David C. Hallam dhallam at rapidsys.com
Thu Dec 7 08:36:51 EST 2006

I am having the opposite problem.  I am hearing the audio from cable channel
38 at 14.193 MHz.  The local provider Knology came out once, but as it
always happens the interference was not there when the tech was there.  He
went around with his signal strength meter and didn't find anything.


> -----Original Message-----
> From: rfi-bounces at contesting.com [mailto:rfi-bounces at contesting.com]On
> Behalf Of Commander John
> Sent: Wednesday, December 06, 2006 8:13 PM
> To: rfi at contesting.com
> 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.
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