It is much like what I recall when the hydroponics shop was still in business a couple blocks away. But in that case the source was never on less than 15 min at a shot.
Part of what is maddening about current is that duration is completely random, seeing blips during ft8 turnarounds, followed by blocks of 30 min solid hash, 5 min free, completely unpredictable. I can get ft8 cycles to complete *just enough* to not rage quit and shut the radio off. And 15/30 seem less affected than 20/40, which is Confusing. Since the whole band goes I wouldn't expect it to follow that sort of harmonic behavior. What would a 20m spark gap transmitter look like on modern gear? On Sun, Feb 2, 2020, 9:29 PM Don Wilhelm <[email protected]> wrote: > Scott, > > It would appear as though you are receiving noise from somewhere. Your > steps have eliminated your house, but your neighbors may be the source. > > I don't have an easy answer, but I don't think it is in your KX3. To > test, does it occur if you connect a dummy load? If not, it is coming > in on your antenna. > > Filters and NR and NB are not likely to tackle it adequately. You will > have to locate the source and send a notice to the FCC for action. You > can use the KX3 portable with a short antenna to try to localize the > source. > > Sounds like the interference from "grow lights" that have been reported > in the past. Are any of your neighbors starting gardening plants or > growing pot under UV Grow Lights? > > 73, > Don W3FPR > > On 2/2/2020 5:13 PM, Tox wrote: > > Hoping someone has a suggestion for how I can work around some local QRM. > > > > I have a kx3 with filters installed > > I have wsjtx running. > > I've recently added a px3 to see if it would help provide insight. > > > > I find intermittent broadband noise that desenses my receiver on multiple > > bands. 1) It appears to either be On or Off, no visible fading. > > (Transitions are <<1 second). Sometimes a little flickering but usually > > extends for minutes to hours. > > 2) When on, signals in waterfall completely disappear or are reduced to > > just a couple nearby (loud) stations > > 3) when on, it wipes out at least one whole band (usually 20m, sometimes > > 40m as well). > > 4) when on, the full 200khz slice in px3 goes green snow > > 5) still happens if I throw breaker in my subpanel and am running off of > > batteries > > 6) with 30 min of fiddling, haven't been able to see it in a kiwisdr node > > less than a mile away > > 7) pskreporter still shows me to be getting out (to the extent I can) > > > > Broadband, no visible peaks, so not sure I could triangulate it by > > wardriving with a Kerberos. > > > > Any suggestions? > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
