[RFI] HDTV: Plasma vs LCD

N1BUG paul at n1bug.com
Fri Dec 21 07:09:31 EST 2012

I concur. There may be a few quiet ones, but unless you have reports 
from several sources all indicating the same model TV to be one of 
those, I would stay clear of them. Or at least make sure you can 
take it back for a full refund if it causes problems. I have a 
plasma TV 300 to 400 feet from most of my antennas that produces 
serious RFI on all bands from 160 through 6 meters. I can hear 
several other, weaker plasma TVs out to over 2000 feet away! There 
is NO WAY one of the things is coming into MY home. Putting filters 
on the TVs can help somewhat, but I'm convinced they radiate RF 
directly off the screen. The other problem is that most people who 
have a plasma TV have a full home entertainment/home theater system 
with a dozen cables attached to the TV. Each and every cable needs a 
common-mode choke. Even then the noise just gets a few dB weaker in 
the cases I've seen. It's certainly not gone.

Paul N1BUG

On 12/20/2012 11:44 PM, Leigh wrote:
> Completely agree.  Next door neighbors have a large plasma inside their
> family room about 75 feet from my shack and more than 125 feet from the
> antenna.  I can watch them turn it on and instantly I have a horrible FM
> frequency varying noise, S2 to S9 about every 15 kc's from 80 through 10
> meters...and they would have to be in the North direction of course.  Gawd
> awful!  Don't know how these can ever pass testing standards.
> 73 de Mike
> K7PI
> ----- Original Message -----
> From: "Richard Battles" <wb4byq at gmail.com>
> To: "Dave Harmon" <k6xyz at sbcglobal.net>
> Cc: <rfi at contesting.com>
> Sent: Thursday, December 20, 2012 6:04 PM
> Subject: Re: [RFI] HDTV: Plasma vs LCD
>> What ever you do, do not, do not, do not buy a plasma tv of any kind.  I
>> moved to the county of 5 acres to get away from a Samsung 50 inch plasma
>> within 30 feet of my house,  a plasma down the block,  one behind me about
>> 300 feet.  noise, noise, noise every where.
>> richard

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