Yeah, all bands. Then suddenly clears, signals sprout all over the waterfall and are promptly silenced once more.
On Sun, Feb 2, 2020, 9:44 PM Tox <scott.sm...@gmail.com> wrote: > Hm. And as soon as I send that I check, and 15/30m has 15dB of odd surging > over a 1-2Hz cycle. Maybe it really it taking everything out > > On Sun, Feb 2, 2020, 9:40 PM Tox <scott.sm...@gmail.com> wrote: > >> 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 <donw...@embarqmail.com> 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
