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Peskies / Re: Angry and not so angry fishermen 5178.25 USB 1200 UTC 1 Aug 2019
« on: August 04, 2019, 1606 UTC »There used to be hf barge traffic on the Missouri and Mississippi rivers, where did it go?
Cellphones.
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There used to be hf barge traffic on the Missouri and Mississippi rivers, where did it go?
I found that reception was equally good either near horizontal or tilted close to 30 degrees. Maybe Countryman's original 30 degree design was in regards to transmitting for his intended purpose?
Driving home last evening I have my radio set to 27.385 and as usual there is no activity, so I leave it at low volume. Just before 6:00 Los Angeles time, the swisher sound was so clear and very loud. I only heard one, it sounded like a local signal but chances are it came from some distance.
Groundwave is probably the answer I think, but would appreciate comments from fellow HFU DXers.
Just bounced back over to 7998 and HI has now returned.
09MAR2019 23:36z 7998.07 KHz, fairly strong then fades out for a transmission or two.
Noticing a large number of swooshes on the lower freeband frequencies - roughly 26.500 MHz to 26.900 MHz, with some in-band as well. All 40 CB channels are busy at 1613 UTC.
You want to set up multiple beacons? Awesome.
In addition to a 22m beacon, you should set up beacons for higher and lower frequencies. The 2, 4, 6 and 8 MHz bands are popular. I also recommend setting up a beacon on 11 meters as that can have some spectacular results (well, it will when the solar cycle picks back up again).
In regards to stealth or covert antennas, wire antennas are the way to go. Since you're dealing with low power transmitters you don't need a thick wire. The humble 1/2 wave dipole is a sure bet, but there are other options too depending on what limitations you have.
High power RF generators, capable of lots of watts at 27 MHz, ending up on the surplus market. What could possibly go wrong?
I wonder how many of these ISM users use the 40.680 MHz frequency vs. 13.56 MHz or 27.12 MHz. I know these sporadic-E openings have included (sporadic) 6-meter/50 MHz band DX as well as 11-meter and 10-meter openings. So perhaps 40 MHz (8 meters!) 40.66-40.70 MHz is another place to look for these ISM swooshers/swishers/heaters/fish hooks if/when the bands are open and 6 meters/VHF low band is active.
BTW, Exo and Chris, great waterfall images. Always nice to see signals literally every 10 kHz from 26.7 MHz or so to 27.5 MHz or 27.6 MHz when the band is open enough for the ISM signals to be seen on the SDR waterfalls.
I am now (2120 UTC 4 Jun 2019) copying one on the 19 meter band, not sure if I have noticed one before on either 13560 or 27120 kHz, where they "should" be:
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And some more higher up the band:
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And more!
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The 11m was open this morning, around 1150z I was hearing lots of stations from the midwest, such as the Chicago area. I noticed quite a few sliders:
Looks like the "Sliders" we talked about a few years ago? https://www.hfunderground.com/board/index.php/topic,12565.0.html
I still notice them from time to time, mostly on the higher frequencies, very rarely on the lower bands.