I have a 27" Dell display on my tower PC (4-banger AMD processor @ 3.6 GHz). That Dell display, too, produces interference on HF all the way through they Water Hole at 1.42 GHz! It becomes worse as frequency is increased! I have completely covered the back of the display with aluminum foil and commoned that to the video connector on the back of the display. All this added aluminum foil is not so much for classic shielding, but to give the fields closure closer to their points of origin and prevent them from opening (radiating) into free space.
Another hint: I was given three older Compaq desktop PC's. Usually Compaq did better with EMC/RFI than these units. They all just scream out the line cord from HF through VHF. In their day, they would NOT have passed regulatory testing for either radiated or conducted emissions. So be it........ Installation of a standard line filter cured that problem. Simple installation by Compaq of a common mode choke would likely have brought them into compliance with FCC and international laws. But, remember, only one unit has to pass testing once (although the suppliers are required to do audits, but typically, no one does) and what ever the contract manufacturer does after that is 'hands off'. I won't belabor the point further......
Dave - WØLEV
On Fri, Nov 17, 2017 at 1:18 AM, Normand Fortin <normand_fortin@...> wrote:
Dave - WØLEVJust Let Darwin Work