Ok. Not as complex as I thought-in the TV! It sounds like "simple" RF interference through the antenna. However, I have just tried shaking the "coins in a baggie" at my computer monitor - nothing! Now at a 24 year old TV on wire antennas in my basement. I got nothing at VHF frequencies (54MHz to 216MHz) but I do get some white "birdies" on UHF. There is more of them the higher I go. Highest I can get is channel 59 (746MHz). Conclusion:- the "coins in a baggie" generates high frequency RF noise, but it doesn't seem to be at a very high level. I had to be very close to the antenna, shake it real vigorously and then I didn't get many random "birdies". Maybe 20 or so over the screen!! I can get a lot more interference especially at VHF tuning, just "sparking" the wire ends coming from a 12Volt DC power supply together!! Rene, when you took a scewdriver and rubbed the metal blade along that radiator seam maybe you were slowly discharging youself of a charge generated as you walked over to it, causing sparks and hence RF. Tony O'Hara
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