I second the power supply as well. I used to build a computer with every new generation of chip that came out and found the cheaper supplies were usually noisy. There's several good brands today & the last one I used was either an Antec 700W or OCZ 700W. I can't recall which but both companies make good products and no RFI I can see/hear. I think it was the Antec...
73, Gary KA1J > Could be coming from the power supply? Sometimes simple clip on chokes > are not enough either. I have a similar problem here on 20M I have > dual (Identical) monitors . One has an irritating but not > debilitating spur on 20 the other doesn't ..If I swap the monitors > the spur follows the monitor. Have tried a handful of ferrites to no > avail so it is likely "radiated" IMO and not conducted. > > Grumpy Dave > NR1DX > > On 11/26/2019 6:41 AM, Rodman, David wrote: > > A few ideas might be helpful here. I was at the station over the > > weekend and found a significant amount of noise coming from one of > > two computers in the station. Significant noise S5 at 1820. One > > computer runs the cluster and 2m connection. That was clean. The > > other handles most of the remote chores and has about 15 USB serial > > devices attached. Everything was off, except a battery operated > > transceiver attached to the receive antenna feed, the modem for the > > cable and my router. One can definitely see that operating the > > computer, closing windows or plugging in USB devices causes the > > modulation on the signal to change, this isolating the source to the > > computer alone and possible connections to peripherals (they were > > all turned off by the way). I did have few chokes available but > > attaching them to the USB wires out of the computer to their various > > devices made no improvement. I could get more specific but need to > > leave for my office now. Any ideas might be helpful and appreciat > > ed. > > > > > > --- > > David J Rodman MD > > Assistant Clinical Professor > > Department of Ophthalmology > > SUNY/Buffalo > > > > Office 716-857-8654 > > _________________ > > Searchable Archives: http://www.contesting.com/_topband - Topband > > Reflector > > -- > Dave > [email protected] > www.ArtekManuals.com > > > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband > Reflector > _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
