Amongst the usual residential area microprocessor RFI trash, I have also endured powerline RFI at my station for years. I only operate on 160 to 6 meters. Sometimes it gets worse - sometimes it subsi
Amongst the usual residential area microprocessor RFI trash, I have also endured powerline RFI at my station for years. I only operate on 160 to 6 meters. Sometimes it gets worse - sometimes it subsi
Ed & Chuck ~ Ed is correct about how I probably let my layers of RFI sources gradually build up over time. Looking back over 3+ years of RFI log notes I see that I was not very good at pinpointing th
Our gas furnace has a problem - and I wonder if there is potentially a connection between RFI from my transmitter and a failure of a furnace ECM inducer. Symptoms: (1) when turning on the thermostat
I just had a successful outcome with RFI from a new Lennox furnace we installed 3 weeks ago. It is a Lennox SLP99UHV gas furnace. When running, it generated noise which was *8 dB* up from the previou
I failed to mention that the manufacturer, Lennox, specifically suggests using a *shielded* thermostat cable. "IMPORTANT . . . We highly recommend using 18 - 22AWG shielded thermostat cable for commu
Here is yet one more thing I failed to mention in earlier parts of this thread . . . "Reducing Electrical Noise . . . Keep all [thermostat] communication wiring as far away from the house electrical
A few other troubleshooting ideas: (1) When the condition is happening . . . one-by-one, disconnect (and ground) each control line or device that is present on that tower. (2) Similarly, and again on
I notice the subject of "INTERMODULATION" is given significant coverage in "THE MITIGATION OF RADIO NOISE AND INTERFERENCE FROM ON-SITE SOURCES at RADIO RECEIVING SITES" (November 2009) published by
In terms of how to best spend your time getting to an actual RFI solution I think, going out and finding location of the source yourself is far better than spending time complaining, notifying, recru
While we are daydreaming about locating RFI sources with drones - here is more food for thought: https://www.modernpowersystems.com/features/featurepotential-game-changer-finding-imminent-power-line-
Within the past year or two, we had reports of a steady 40-meter carrier on our region-wide GMCC reflector. It was down in the CW band. Various stations chimed in with their beam headings and other t
Yesterday I braved the very cold weather - and used my portable flag (WD8DSB_design) antenna to DF. The best heading to the 7195 source I got was: 160 degrees from True North. My QTH is SW Colorado S
*FOLLOW-UP TO PREVIOUS POST in September 2021*: http://lists.contesting.com/archives//html/RFI/2021-09/msg00093.html The earlier post described multiple *separate* and i*ndependent sources* along a s
I have a next door neighbors Enphase system within 50-60 feet of my tower. There is definite RFI the system . . . but it is only noticeable on the higher HF bands (15-12-10 and maybe 6 meters). Ive g
Hypothesis: Solar system. Next steps: (1) Ask neighbor if recently installed solar system. (2) Have Mike park his receiver on frequency of RFI spike 10 minutes before exact time of sunrise - then con
Eric ~ About three years ago, I was in the same situation - with impending LED street lights about to be installed. See this earlier post on this reflector: http://lists.contesting.com/archives//html
Hi Jim McCook 'YA My refrigerator RFI story . . . I had what sounded like broadband white noise. Noticed it on 80 meters (during the day while band was closed). Shut off power to my house, and the wh
Dons approach in this case is a good example of first focusing on WHERE IT IS. Imagine how much time they saved by simply locating and sniffing out the source. Trying to determine WHAT IT WAS by look