That tends to support what I'm thinking. That one TV is
susceptible/defective. Perhaps swap two TVs and see if problem stays in
same place or follows the TV.
Bob
-----Original Message-----
From: rfi-bounces@contesting.com [mailto:rfi-bounces@contesting.com] On
Behalf Of DGB
Sent: Thursday, April 03, 2008 5:29 AM
To: Bob Turner
Cc: dgsvetan@rockwellcollins.com; rfi@contesting.com
Subject: Re: [RFI] Digital TV Problems
No the TVs are all different makes and brands. The one bothered is a 40"
HD Samsung.
thanks 73 Dwight NS9I
Bob Turner wrote:
> I believe he said TV service just went digital. On same or different
freq?
> Perhaps the TV is more susceptible on new freq it receives on.
>
> Are all 4 TVs the same make and model? Let us know.
>
> Bob
>
> -----Original Message-----
> From: rfi-bounces@contesting.com [mailto:rfi-bounces@contesting.com] On
> Behalf Of dgsvetan@rockwellcollins.com
> Sent: Wednesday, April 02, 2008 3:44 PM
> To: DGB
> Cc: rfi@contesting.com
> Subject: Re: [RFI] Digital TV Problems
>
> Dwight,
>
> An interesting problem, especially since I heard recently that some
> community CATV systems are planning to run digital video on CAT-5 lines
> around town. That's a truly scary thought. I have heard of one system in
> another town that is working, but they did use SHIELDED CAT-5E cable
> (verified by visual inspection by hams). In your case, a few questions
> come to mind:
>
> 1. What is the orientation of this one problem set relative to your
> antennas?
>
> 2. What is the connecting device between the TV and the phone lines? Is
> it a passive balun or an active device "converter" box?
>
> I saw K9YC's reply to your inquiry. Read and heed the info from his web
> site. The grounds you have are very nice and good for system protection
> from lightning damage, but this is strictly an RF overload problem
> somewhere. If the TV was good on an outside antenna before, it is
> probably not the set that is the problem now. You should concentrate your
> efforts on the interface between the TV and phone lines, and don't forget
> that if you use ferrites, be sure they are appropriate for the frequency
> bands you are using.
>
> Please keep us informed on your progress, and best luck.
>
> 73, Dale
> WA9ENA
>
>
>
>
>
> DGB <blueheron@Bayland.net>
> Sent by: rfi-bounces@contesting.com
> 03/31/2008 07:18 PM
>
> To
> rfi@contesting.com
> cc
>
> Subject
> [RFI] Digital TV Problems
>
>
>
>
>
>
> I've recently had subscribed to a service thru the fone lines that
> include TV and Internet. I've had the internet thru it for a long time.
>
> I have 4 tv's in the house hooked to this system.
>
> My shack is in a separate building but still about 30' from that problem
> tv. I've a good single point grounding system that is all connected to
> the tower, the service here in the shack, and the house's service. It's
> all connected undergnd with 2" copper and gnd rods every 16' (over 30
> rods).
>
> Recently I've been getting into the TV when xmtg but just one of the
> tv's. My signal scrambles the digital image, like tiling.
>
> I never had that problem when the tv had an outside antenna, even when
> running legal limit. I've put several clamps-ons on the problem tv. I
> also have a cat5 and telephone cable coming out here to the shak
> underground and have clamp-ons on them as well.
>
> Where do I start?
>
> Thanks ... 73 Dwight NS9I
>
>
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