I might not hear that thing at all.” You are so wrong. So, you are now saying, “So what-there’s a big difference between 10 feet away and the distance between me and my closest neighbor. After subtracting the ambient noise curve from the second curve with the screen operating, I obtained the noise produced by the screen alone. Next, I turned the Panasonic ON and repeated the test, again importing it to the Excel spreadsheet. This allowed me to graph the ambient noise of the area. I took a reading across the HF spectrum and saved it to a diskette file, which I then imported to an Excel file. Then, I placed a 2m rubber ducky antenna about 10 feet from the front of the Panasonic Plasma display. Your new Super Duper Signal Sucker receiver will definitely find this baby on any of the HF bands! Notice how the noise is the worst on the low bands, but the rest of the bands are impacted as well. Those numbers on the right side of the graph represent db above the ambient noise level here inside the house.
#PANASONIC PLASMA SCREEN TV TV#
It was unbelievably strong!īelow is a graph that shows the noise output of the plasma TV on the HP Network Analyzer. I hooked up my HP Network Analyzer to see just how bad the problem was across the HF spectrum. I did a little direction-finding and found that it was coming from my house! Sure enough when I switched off the recently installed plasma display, the noise disappeared and I could hear the DX again.ĪDT talked with Panasonic, which informed them that there was nothing that could be done. Then, I looked at 80 meters-a gigantic noise at 3.505 MHz and other frequencies in the band. Same signal but a little weaker as I went up in frequency. The morning after the installation of the plasma screen, I noticed a huge digital signal about 7.001 MHz and a few other places on the same band.
ADT, the security company, had suggested a Panasonic 42” Plasma TV/CCTV monitor since the light output was high enough that the pix could be viewed in broad daylight. I once installed a CCTV system to keep an eye on my toys.
Unfortunately, no one is mentioning the horrendous RFI that these plasma things put out on HF! Plasma TVs produce bright, vivid color reproduction.
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