Matt, Quite interesting. In my situation, the nearest neighbor is 1/4 mile away, so hopefully the effects of a plasma TV will not be apparent to me. When I went shopping for a TV, I avoided plasma and went with the LED screen. That was the lowest power consumption TV, and since the XYL watches a LOT of TV, keeping the AC power consumed to a minimum was an important parameter.
The LED displays do not create any interference as far as I can determine. 73, Don W3FPR On 9/10/2012 2:29 PM, Matthew Zilmer wrote: > Plasma TVs should be made explicitly illegal, because of the interference > issues they cause on HF. But the reverse is also often true. > > I had a neighbor who bought a plasma TV. The dern thing put out all sorts of > QRM and gudge around 4 MHz (near one of the MARS frequencies). As I operated > more and more often on that MARS freq, I found that the interference > decreased over time (at least when I was on the air and transmitting). > > Much later, the neighbor reported that she'd taken the TV back to the > retailer because right around 5 PM every day she couldn't receive anything > for a few seconds at a time. She assumed it was defective (it was) and they > gave her credit for another (LED) TV. We live in an area with large > setbacks, so her plasma set was more than 100 feet from the antenna. She's > had no problems with the LED TV. > > Matt Zilmer, W6NIA > In status quo voluntas non sufficit > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Don Wilhelm > Sent: Monday, September 10, 2012 11:20 AM > To: Jim Bennett > Cc: Elecraft Reflector Reflector > Subject: Re: [Elecraft] K3 & Plasma Question > > Jim, > > Plasma TVs are wideband signal generators, and almost certain to cause QRN. > Go for a good LED TV and things will be interference free. Yes, the plasma > TVs are less expensive, but if you value your on-air time while the XYL > watches TV, you will need to use something other than a plasma TV. > > 73, > Don W3FPR > > On 9/10/2012 1:57 PM, Jim Bennett wrote: >> This is only slightly off-topic, but since I do operate a K3, it still fits >> - kinda! >> >> We have two plasma TV's in our home. One is a ten year old Sony 42 inch >> unit. The other one is a two year old Samsung 63 inch TV. They are about 50 >> feet from the shack, and only eight feet away from each other - two >> different rooms. The Sony has never, ever caused any sort of QRN on any of >> the ham bands. Because of that, we purchased the Samsung unit right after >> moving into this QTH. I did not have an HF antenna installed for several >> months after moving in - when I finally did get one put up, I saw some ugly >> QRN on most of the HF bands. However, at the time I was not aware of the >> "plasma effect" that I am now. When I heard the QRN, I "assumed" it to be >> from the PG&E high power lines that are pretty close to the house. By the >> time I put two & two together and figured out that the ugly noise was from >> this Samsung TV, it was already out of warranty. Ughhh.... >> >> We are now in the market for another TV, and have been looking at a very >> nice Panasonic 65" Plasma set, model TC-P65VT50. I've already told the Best >> Buy sales manager that IF we do buy it and IF it causes QRN to the HF bands, >> it is coming right back. He said that is no problem. But, if I can query >> this group to see if anyone else has one of these TV's, I may be able to >> avert a lot of work ahead of time. Our second choice would be an LED set, >> but after seeing plasma and LED side by side, playing the exact same >> content, I want to stay with plasma - BUT ONLY IF IT DOESN"T SCREW UP THE >> K3!!! >> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
