[Elecraft] K3 & Plasma Question

[Don Wilhelm]

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: elecraft-bounces at mailman.qth.net [mailto:elecraft-bounces at mailman.qth.net] 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!!!
>>
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