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@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@comcast.net]
>>> Sent: Tuesday, March 25, 2014 2:29 PM
>>> To: Hare, Ed W1RFI
>>> Cc: rfi@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@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@contesting.com] On Behalf Of KD7JYK DM09
>>>> Sent: Friday, March 21, 2014 12:23 AM
>>>> To: rfi@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
>>>>
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>>
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