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Re: [RFI] Plasma TV's are killing our hobby

To: Tony <dxdx@optonline.net>
Subject: Re: [RFI] Plasma TV's are killing our hobby
From: dalej <dj2001x@comcast.net>
Date: Fri, 31 Dec 2010 05:17:43 -0600
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
Hello Tony,

I have noisy junk around my QTH too.  Dimmer lights, TV's, fancy lighting 
systems, computers with junk PS's etc.  I bought both the MFJ 1025 and the 
Timewave noise canx box, I forget the model number.  I am currently using the 
MFJ model.  These boxes work about the same and they canx the noise before it 
gets into the radio.  They work on only one noise however and you must install 
a good noise sense antenna not the little antenna sticking out of the box.  The 
device has to be able to hear the noise in order to canx it out.  It is a last 
resort and it does work.  These boxes do introduce loss, but on the low bands 
it doesn't matter.  I generally do not need these devices above 40 meters.  The 
best way is to quiet the RFI at the source.  Good luck with it.

Dale, k9vuj

On 31, Dec 2010, at 3:44, Tony wrote:

> All,
> I recently discovered that a neighbors Plasma TV has been the source of 
> interference I've been experiencing on HF. Needless to say, it's 
> difficult to hear much while beaming in his direction and if it wasn't 
> for the fact that I'm far enough away to null the noise in other 
> directions, I'd be off the air.
> To add insult to injury, the same noise has turned up on another beam 
> heading, but fortunately, it's much weaker and not nearly as intrusive. 
> The fact that it was discovered a day after Christmas leads me to 
> believe that someone received a new Plasma for the holiday.
> I hate to say it folks, but I think it's only a matter of time before we 
> become overwhelmed with devices like these, especially in areas like 
> mine where neighbors are within 100 feet of each other.
> We're fortunate that our utility company has a special investigator who 
> does a terrific job solving RFI issues, so we will pursue this one. I 
> feel for those who aren't so lucky.
> Tony -K2MO
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