HFU HF Underground
Loggings => Other => Topic started by: Beerus Maximus on July 28, 2013, 1635 UTC
-
Centered on approximately 17475 KHz, but audible best in USB at 17474 KHz or in LSB at 17476 is a pronounced "beep" at about 5 second intervals (edit: noted by Token to be actually 6 seconds). Noted at 1635 UTC on 7/28/2013, tipped via #wunclub on IRC, confirmed by Token to be one of the ditters. It's S7 with minor fading here.
Other frequencies active right now (these are the center freqs but I tune -1 KHz in USB):
17650 (much weaker than 17475)
17950 (much weaker than 17475)
17975 (equal to 17475)
18050 (equal to 17475)
18450 (very variable signal strength)
Other known possibly freqs are listed here:
http://www.radiohobbyist.org/blog/?p=1155
Update: transmissions on all the frequencies I noted have ceased at 1650 UTC.
-
I posted this over in the HF Beacon forum, but then saw this post so moved my entry to here:
The mystery ditter network was back this morning. I carry this network as “Pips” in my logbook.
At around 1621z quantegy in the #wunclub IRC chat asked if anyone heard beeping on 17474 kHz. This turned out to be the ditter network hitting one of its normal frequencies, 17475 kHz. The pulses were about 124 msec in length and happening every 6 seconds.
As normal this network was hitting multiple frequencies, freqs received here between 1621 and 1649 UTC:
8275
10050
10575
11300
12025
13250
13325
13875
14400
15100
15550
15625
16000
16550
16725
17475
17975
18050
18625
19300
As normal the pulses were sequencing low to high, pulsing first on the lowest freq and then stepping up to the next and pulsing there.
The network went off air at 1649 UTC.
T!