[RFI] ARRL to FCC...

[Dale J.]

My next door plasma is broadband hash with various bumps along the way.  I have one of those bumps especially bad at 3.857, it's 20 db over 9 and sounds like a motor running but changing speed and sometimes stopping and starting.  The broadband hash is all over the 80 meter band and 40 too.  The upper bands are less affected. I suspect part of the noise is from a switching power supply in the plasma tv, that might be what that motor sounding noise is not sure though.  I wish it were my TV, I could then find out more how these things tick before permanently disabling it.  Makes it difficult on my USAF MARS net too.  

Dale, k9vuj



On 25, Mar 2014, at 21:16, David Cole <dave at nk7z.net> wrote:

> Imagine thousands of little lightening bolts...  Thats Plasma TV.
> -- 
> Thanks and 73's,
> For equipment, and software setups and reviews see:
> www.nk7z.net
> for MixW support see;
> http://groups.yahoo.com/neo/groups/mixw/info
> for Dopplergram information see:
> http://groups.yahoo.com/neo/groups/dopplergram/info
> for MM-SSTV see:
> http://groups.yahoo.com/neo/groups/MM-SSTV/info
> 
> 
> On Tue, 2014-03-25 at 18:28 -0600, Tom Thompson wrote:
>> Ed,
>> 
>> I checked out a few plasma tv sets a couple of years ago with a portable 
>> shortwave receiver.  The RFI was coming right out of the front of the 
>> set which made sense since that was where the discharge was occurring.
>> 
>> Tom   W0IVJ
>> 
>> On 3/25/2014 12:31 PM, Hare, Ed W1RFI wrote:
>> 
>>> Thanks, Dale.
>>> 
>>> We can then see if the TV is still in production.  If it is no longer manufacturered, it may be a harmful interference complaint, not a possible emissions-limit violation.
>>> 
>>> The ARRL Lab would also be willing to provide a few filters to try, if your neighbor is willing to work with you.  Some have speculated that the noise comes directly from the TV, and this could be true, but I still tend to think in terms of noise coming out the AC mains and possibly also being radiated by the shield of the incoming coaxial feed line.
>>> 
>>> -----Original Message-----
>>> From: Dale J. [mailto:dj2001x at comcast.net]
>>> Sent: Tuesday, March 25, 2014 2:29 PM
>>> To: Hare, Ed W1RFI
>>> Cc: rfi at contesting.com
>>> Subject: Re: [RFI] ARRL to FCC...
>>> 
>>> Ed
>>> 
>>> I'll see if I can get that information from my neighbor, but it will take a while.  I have to actually get in the house and look at the back of the TV and get the model number because I don't think they know for sure.  As soon as I get it I'll send you a email.
>>> 
>>> Tnx
>>> 73
>>> Dale, K9VUJ
>>> 
>>> 
>>> On 25, Mar 2014, at 13:04, "Hare, Ed  W1RFI" <w1rfi at arrl.org> wrote:
>>> 
>>>> If the ARRL Lab can get some reports involving specific model numbers, we can do some testing and find out where these plasma sets stand.  I had a report in MD that involved two Samsung plasma TVs. One made very loud radiated noise, while the 2nd model, also a plasma TV, was quiet.
>>>> 
>>>> I need reports that involve a plasma TV operating in a neighbor's home causing harmful interference.  So far, most of the reports have been about the QRZ.com and RFI list discussions, not a specific report.
>>>> 
>>>> The ARRL Lab can measure conducted noise and radiated noise from devices, but we really need to start with actual, non-general reports.
>>>> 
>>>> Ed Hare, W1RFI
>>>> ARRL Lab
>>>> 
>>>> -----Original Message-----
>>>> From: RFI [mailto:rfi-bounces at contesting.com] On Behalf Of KD7JYK DM09
>>>> Sent: Friday, March 21, 2014 12:23 AM
>>>> To: rfi at contesting.com
>>>> Subject: Re: [RFI] ARRL to FCC...
>>>> 
>>>> : Now if they would recall all the damn plasma TV's out there doing the same
>>>> : thing it would really tickle my butt cheeks...but, any such action is
>>>> : goodness!
>>>> 
>>>> How mant times have you contacted the FCC regarding the interference to your licensed service?
>>>> 
>>>> Kurt
>>>> 
>>>> _______________________________________________
>>>> RFI mailing list
>>>> RFI at contesting.com
>>>> http://lists.contesting.com/mailman/listinfo/rfi
>>>> _______________________________________________
>>>> RFI mailing list
>>>> RFI at contesting.com
>>>> http://lists.contesting.com/mailman/listinfo/rfi
>>> _______________________________________________
>>> RFI mailing list
>>> RFI at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/rfi
>>> 
>> 
>> _______________________________________________
>> RFI mailing list
>> RFI at contesting.com
>> http://lists.contesting.com/mailman/listinfo/rfi
> 
> _______________________________________________
> RFI mailing list
> RFI at contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi