Radio recordings

North Atlantic Surface Analysis meteo chart received on 7100 kHz. Possibly transmitted from Northwood, UK.

Spectran capture of a Russian military F1B (FSK) intruder on 18150 kHz in the 17m band. The tones are on 18149.6 and 18150.6 kHz (1000 Hz shift). (img0010.gif)

20 kHz wide Over the Horizon Radar (OTHR) intruder obliterates 10135-10165 kHz, including the digital mode section of 30 m ham band. Spectrum capture using a Perseus SDR receiver.

Weak signal from low power beacon IZ3DVW on 3576.5 kHz.

SPECTRAN capture of beacon HG7BHB on its new frequency 5352.5 kHz. (img0007)

60 m beacon HG7BHB on 5357 kHz. This work is licensed under a Creative Commons Attribution 4.0 International License .

The intruder on 14240 kHz in frequency shift Morse code (F1A).

Unid FSK intruder on 14240 kHz, shift 250 Hz. Possibly Russian Military.

Unid intruder on 14135 kHz. Perseus SDR waterfall.

Unid intruder on 14135 kHz. Perseus SDR spectrum.

Letter beacon (MX) "K" from the Russian Far East on 7039.3 kHz. 2015-10-28 @ 20:37 UTC. (img0004)

Single Letter Beacon "V" on 6928 kHz CW. According to the HF Underground Wiki this beacon is located in Khiva, Uzbekistan. (img0002,gif)

A dasher (or T) beacon on 7010 kHz CW. Origin and location of this signal remains uknown. (img0004,gif)

Capture of QRSS-1 beacon SV8CYR (SZ8S) on 7028.7 kHz.

Experimental HF beacon SV1TEST on 6815 kHz CW. Captured on 2010-08-07, 15:52 UTC. The beacon was traced at a remote location in Acharnae, a northern suburban of Athens.

Two OTHR signals on 3185-3215 kHz and 3240-3260 kHz, below the 80 m band. According to Wolf Hadel, DK2OM, in his 2013 IARU report "Radar Systems on Shortwave", the one on 3250 is located in Romania or Greece. The strong signal just above 3260 kHz and the one near 3158 kHz are second harmonics of a greek MW pirate broadcasters. Captured on Perseus SDR receiver on 2014-12-26 at 1656 UTC.

Spectrum capture of PLUTO OTHR (Over The Horizon Radar) on 28370 kHz, in the 10m ham radio band, usign a Microtelecom Perseus Receiver. 20014-12-25, 09:40 UTC.

Spectrum capture of the Iranian OTHR (Over The Horizon Radar) on 28000 kHz, usign a Microtelecom Perseus Receiver. 20014-10-28, 08:13 UTC. From Wikipedia: Sepehr (OTHR) is an Over-the-horizon radar system being developed by Iran. Little is known of the project, except it has a reported range of 3,000 kilometers. It was scheduled to enter operational status in 2013. In August 2013, Iran announced completion of a first stage of the project with a range of only 300-700km. In 2014 Iran announced it wished to establish a Space Based radar system. It is currently expected to be finalised by the end of 2014.