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
UNID Mode 6443.3 kHz 2045 UTC 2 May 2018 Started by ulx2	3 Replies 2762 Views	May 21, 2018, 1654 UTC by Josh
PIPs / Ditter active on 6720, 6820, and 6920 kHz Started by GC	7 Replies 3076 Views	May 03, 2018, 0207 UTC by Token
MOVED: UNID 9059.85 USB Started by Token	0 Replies 1852 Views	May 02, 2018, 1207 UTC by Token
UNID PIP 6420 & 6520 kHz 0110 UTC 1 May 2018 Started by Traveling Wave	2 Replies 1955 Views	May 02, 2018, 0130 UTC by Traveling Wave
PIPs 2018-04-19 22:45 UTC Started by GC	5 Replies 2768 Views	April 20, 2018, 2353 UTC by GC
UNID PIPS 2331 UTC 18 April 2018 Started by Traveling Wave	0 Replies 1955 Views	April 18, 2018, 2358 UTC by Traveling Wave
How does one Identify a Mystery Signal? Started by K5KNT	7 Replies 4963 Views	April 09, 2018, 1701 UTC by Token
PIP 6820 kHz 0045 UTC 6 April 2018 Started by Traveling Wave	6 Replies 4553 Views	April 08, 2018, 1702 UTC by Token
OHR (Over the Horizon Radar) on 160M? Started by CaptnKliegle	2 Replies 2791 Views	April 02, 2018, 1416 UTC by Token
Unidentified Signal, 11591 kHz, 19 March 2018 1817 UTC Started by K5KNT	1 Replies 2256 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 1754 Views	April 01, 2018, 2250 UTC by Asuyuka
7.180 20k wide digital 3/10 4:20 Started by MrMomB	5 Replies 3190 Views	March 12, 2018, 2348 UTC by MrMomB
HAARP 6300 KHz 20 Dec 2017 0747 UTC ? Started by KaySeeks	3 Replies 3227 Views	March 11, 2018, 2108 UTC by Josh
MOVED: 6398,50 CW Started by Token	0 Replies 2303 Views	November 03, 2017, 2304 UTC by Token
around 6297 mystery signal Started by bumbelstock	1 Replies 2534 Views	November 03, 2017, 2303 UTC by Token
UNID 7508 kHz 12 Oct 2017 0145 UT Started by Boriken	1 Replies 2549 Views	October 13, 2017, 1714 UTC by Josh
UNID mode 6890 kHz 12 Aug 2017 2145 UTC Started by ulx2	3 Replies 4506 Views	September 20, 2017, 1139 UTC by ulx2
UNID 5250 khz 15 Sept 2017 0318 UTC Started by Matt_B	0 Replies 2166 Views	September 15, 2017, 0220 UTC by Matt_B
UNID signal 6946 kHz USB 0000z 8/11/2017 Started by MaxwellHouse	2 Replies 2863 Views	August 11, 2017, 1910 UTC by MaxwellHouse
UNID 7435 kHz AM 24 Jul 2017 0245 UTC Started by ulx2	0 Replies 2199 Views	August 11, 2017, 1705 UTC by ulx2