Is your Sony a plasma or an LED?
73, Duane
Duane Calvin, AC5AA
Austin, Texas
www.ac5aa.com
-----Original Message-----
From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
On Behalf Of Kirb Nesbitt
Sent: Tuesday, November 20, 2007 3:37 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] OT: RFI from Plasma TV?
Rick,
you may have got mine! I had purchased a similar model from Panasonic
and tried everything to reduce the hf noise it produced. With the help
of my neighbor we packed it up and hauled it back to Costco for a
refund. Ended up picking up a Sony a few days later thats been 100%
quiet. I had wondered if perhaps I'd just hit upon a particular
model/year that was poorly designed. Apparently not.
Good Luck!
Kirb - VE6IV
--
Rick Williams wrote:
> Bernie I own a Panasonic 50 inch plasma and the short
> answer is yes. Just yesterday I received the message
> below from Panasonic (Canada). I have already
> installed a large toroid on the power cord (the stock
> cord IS shielded with a built it toroid and my added
> toroid with 8-turns of the power cord seemed to do
> nothing), an excellent surge protector (that seemed to
> make things worse), put the TV on another circuit and
> the rest of course is chaff thrown up by the
> manufacturer (the GND system meets current codes and
> the plug is wired correctly). The change of circuit
> DID help somewhat. The noise introduced by the TV on
> certain frequencies on the 80 metre band is
> approximately 2 S-units (i.e. significant) and similar
> on selected frequencies on 20 and other bands. So
> it's all over the place on all the bands I work with
> all the antennas I use.
>
> I put every split choke I own on the power line along
> with the large wound torroid with no change.
>
> The TV has a built-in EMI filter at the plug (I can
> see it through the vent holes) so placing an
> additional Corcom filter in series seemed to make
> things worse. Finally, I have a large isolation
> transformer, currently serving as a doorstop in the
> shack, that will be installed later to see if it
> helps.
>
>>From the Panasonic note they seem convinced that the
> power cord is radiating. My fear is that the plasma
> design itself is the source of the interference and
> that will be significantly more difficult, if not
> impossible, to resolve.
>
> 73,
>
> Rick
> VE7TK
>
> Website: http://www3.telus.net/ve7tk
>
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