HFU HF Underground
Loggings => Shortwave Broadcast => Topic started by: markolinux on October 01, 2019, 2224 UTC
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I'm hearing the audio programming for WWVH, with the woman announcer, on 15000 kHz. Either they are substituting the normal programming of WWV with that of WWVH, or WWVH is coming in here instead of WWV (which I doubt, because it's just not the right time of day for that).
10000 and 5000 have the normal WWV announcer.
Mark Pettifor
Goshen, IN en71
--Airspy HF+ Discovery
--30' vertical wire
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If that were the case (that they got the audio swapped), LOTS of people would be reporting that. But those stations aren't connected in any way. WWV has their signal generators right on site, and I would bet that WWVH has theirs at their place as well. For whatever reason, you copied WWVH.
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This evening on the Grey Line I heard both WWV & WWVH clearly on 5 and 10 plus 15MHz as per normal. Nothing untowards this way. ;)
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Propagation can do strange things. When I was a kid I'd hardly ever hear WWVH. Over the last year or so I've heard WWVH dominate on 10 Mhz and sometimes 5 Mhz at night more than once -- at least one time I did not hear WWV at all.
And I'm in the PNW.
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If the band goes long, closer in stas go out and dx stas come in, simple as that. When that happens, it's a good time to hit the dials and see what else out of the ordinary is coming in.
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If the band goes long, closer in stas go out and dx stas come in, simple as that. When that happens, it's a good time to hit the dials and see what else out of the ordinary is coming in.
This.
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If the band goes long, closer in stas go out and dx stas come in, simple as that. When that happens, it's a good time to hit the dials and see what else out of the ordinary is coming in.
This.
To get technical, the idunnosphere gets "raised" to a height that allows for a lower angle of radiation to propagate and at the same time seemingly curtails close in signals since they're not being supported by nvis for the duration. You can see this clearly on 40m in the day to nite transition where the band goes long, dx starts coming in and stations from close by to several hundred miles become weaker and weaker. Of course the reverse takes place in the morning when the gray line creeps across your location and the dx stations fade out and locals start booming in via nvis. 40m being a predictable example of the band going long or short.
Sometimes the angle is so low there may be no hops between stations on opposite sides of the earth ie the sigs skim the inside shell of the idunnosphere layer around the world, never hitting the ground till they reach the endpoints. Crazy propagation modes like whispering gallery, chordal hop, and long delayed echos. On 40m we had lde's going on once or twice, that was neat!