HF Mystery Signals

We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissible in your locale.

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Subject / Started by	Replies / Views	Last post
PIP 6820 kHz 0045 UTC 6 April 2018 Started by Traveling Wave	6 Replies 3001 Views	April 08, 2018, 1702 UTC by Token
OHR (Over the Horizon Radar) on 160M? Started by CaptnKliegle	2 Replies 2212 Views	April 02, 2018, 1416 UTC by Token
Unidentified Signal, 11591 kHz, 19 March 2018 1817 UTC Started by K5KNT	1 Replies 1802 Views	April 02, 2018, 1358 UTC by Token
UNID 590, 710 kHz (And A Few Other Frequencies) @ 4/1/18 0020 UTC Started by Asuyuka	0 Replies 1437 Views	April 01, 2018, 2250 UTC by Asuyuka
7.180 20k wide digital 3/10 4:20 Started by MrMomB	5 Replies 2685 Views	March 12, 2018, 2348 UTC by MrMomB
HAARP 6300 KHz 20 Dec 2017 0747 UTC ? Started by KaySeeks	3 Replies 2677 Views	March 11, 2018, 2108 UTC by Josh
MOVED: 6398,50 CW Started by Token	0 Replies 1955 Views	November 03, 2017, 2304 UTC by Token
around 6297 mystery signal Started by bumbelstock	1 Replies 2230 Views	November 03, 2017, 2303 UTC by Token
UNID 7508 kHz 12 Oct 2017 0145 UT Started by Boriken	1 Replies 2218 Views	October 13, 2017, 1714 UTC by Josh
UNID mode 6890 kHz 12 Aug 2017 2145 UTC Started by ulx2	3 Replies 4179 Views	September 20, 2017, 1139 UTC by ulx2
UNID 5250 khz 15 Sept 2017 0318 UTC Started by Matt_B	0 Replies 1826 Views	September 15, 2017, 0220 UTC by Matt_B
UNID signal 6946 kHz USB 0000z 8/11/2017 Started by MaxwellHouse	2 Replies 2564 Views	August 11, 2017, 1910 UTC by MaxwellHouse
UNID 7435 kHz AM 24 Jul 2017 0245 UTC Started by ulx2	0 Replies 1940 Views	August 11, 2017, 1705 UTC by ulx2
UNID Buzzer 5089.8ish 2302 UTC 29 July 2017 Started by Skipmuck	3 Replies 2779 Views	July 30, 2017, 1309 UTC by Token
13358 kHz Signal 2100 UTC 10April 2017 Started by Traveling Wave	4 Replies 6566 Views	April 30, 2017, 1255 UTC by Token
MOVED: 8MHz CW, mystery signals... Started by Token	0 Replies 2001 Views	April 30, 2017, 1254 UTC by Token
UNID digital signal at (approximately) 11064 kHz Started by Strange Beacons	2 Replies 2640 Views	April 09, 2017, 1451 UTC by Strange Beacons
Alternating tones 13985 Started by housecat	1 Replies 3196 Views	March 18, 2017, 0419 UTC by Token
6814khz 0220 utc 02/17/2017 40khz wide. OTHR ? Started by ka1iic	1 Replies 3105 Views	February 18, 2017, 0112 UTC by Token
4020 USB UNID Tone/Alarm? 03/02/16 0114 UTC Started by Jordan_Pirate_Hunter	3 Replies 3104 Views	February 12, 2017, 1823 UTC by SkyWalker