HFU HF Underground
Loggings => HF Beacons => Topic started by: ChrisSmolinski on November 14, 2018, 1100 UTC
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While monitoring Windy this morning, I also noticed the station on 4111 I've logged a few times previously that looks like a dasher, although I know Exo has commented on it before and suspects it is some sort of communications signal. Just another bump in the night (or early morning here.
Copied using my KiwiSDR and 670 ft sky loop antenna.
I've not copied any of the 4096 beacons in years, and it has been a while since I've heard any of the 4070 beacons, either. Just Windy and A on 2097, which was also coming in well as usual.
(https://i.imgur.com/cU2NHpW.png)
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While monitoring Windy this morning, I also noticed the station on 4111 I've logged a few times previously that looks like a dasher, although I know Exo has commented on it before and suspects it is some sort of communications signal. Just another bump in the night (or early morning here.
Hi @ChrisSmolinski,
Fascinating, that you were able to snag the rare and elusive 4111.2 signal at 1055 UTC.
At one point the 4114.42 kHz dasher and 4111.2 kHz dasher were logged here, 2030UTC 19SEP2018, seemingly working each other.
One transmitted for several minutes, then stopped abruptly and the other transmitted, then they swapped.
They had different signal strengths and propagation fading characteristics.
The dash length and interval were slightly variable on both signals.
Unusual, to say the least.
At the time of day (near noon) when they were logged here, NVIS-only propagation on 4 MHz was happening around the West Coast of USA.
At the time of your logging, you were also copying Windy, which means that propagation to California was good on 4 MHz.
This may indicate a western North America or eastern Pacific Ocean origin for the signal.
The 4063 kHz to 4438 kHz segment is allocated to Maritime Mobile, but there are a lot of footnotes, including Aviation, in that allocation subheading.
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While checking Windy this morning (which was coming in quite well) I also noticed our 4111.2 signal. And it had a new friend, on 4112.75 or so. The two signals appeared to fade in and out with each other, although 4111.2 was always stronger.
1140z:
(https://i.imgur.com/cOCQwed.png)
Then I noticed the pattern of 4111.2 changed around 1151z:
(https://i.imgur.com/NNN4qhR.jpg)
And a minute or two later it changed again:
(https://i.imgur.com/0VfFPj0.jpg)
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While checking Windy this morning (which was coming in quite well) I also noticed our 4111.2 signal. And it had a new friend, on 4112.75 or so. The two signals appeared to fade in and out with each other, although 4111.2 was always stronger. 1140z: Then I noticed the pattern of 4111.2 changed around 1151z:
And a minute or two later it changed again:
Hi @ChrisSmolinski,
The plot thickens!
This appears to be not very typical beacon behaviour ;)
Your series of kiwiSDR screen captures certainly shows some fascinating aspects of the signals.
Combining your recent loggings, and the other loggings last month, another mystery seems to be unfolding :)
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Report
2145UTC 2018NOV15
4111.26 kHz UNID, CW-like dashes, variable length and interval, weak readable
4114.43 kHz UNID, CW-like dashes, variable length and interval, weak readable
PLAY AUDIO UNID CW-like dash signal 4114.43 kHz 2150UTC 2018NOV15 (http://hfpack.com/members/exo/4114_43_kHz_UNID_cw_like_2018NOV15_2150UTC.mp3)
Waterfall image below shows UNID CW-like dash signals at 4111.26 and 4114.43 kHz, 2145UTC 2018NOV15:
(http://hfpack.com/members/exo/4111kHz_4114kHz_UNID_2018NOV15_2145UTC.jpg)
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Windy doing well here at 1057 UTC. No sign of 4111 or 4114 yet.