29 July 2014


heard today on its usual working fqy 28249.0 Khz at 1329z
ER1TEN is a 10m beacon located in small village near the Kishinev, the capital of Moldova.
Power: 5W, Ant GP

27 July 2014

Cluster Beacons

(a.k.a. Single Letter Beacons, Single Letter High Frequency Beacons or Channel Markers)

"D" and "C" cluster beacons
Letter beacons are radio transmissions of uncertain origin and unknown purpose, consisting of only a single repeating Morse code letter. They have been classified into a number of groups according to transmission code and frequency, and it is supposed that the source for most of them is Russia.  Letter beacons have been referred to as:

    SLB, or "Single Letter Beacons"
    SLHFB, or "Single Letter High Frequency Beacons"
    SLHFM, or "Single Letter High Frequency Markers"
    Cluster beacons
    MX (a more appropriate ENIGMA and ENIGMA-2000 designation)

The purpose of the letter beacons is not yet known with certainty. Many theories have appeared in specialized publications, but none is based on documentary evidence. They have been postulated to be radio propagation beacons, channel markers, or beacons used in tracking satellites or for civil defense purposes.[9] Some stations of this family, in particular the “U” beacon, have been implicated in deliberate jamming. According to ENIGMA, cluster beacons are used by the Russian navy (especially its submarine branch) to find the most suitable radio frequency for contact based on current radio propagation conditions.
A recent source (2006) regarding locations was published on the Web by Ary Boender (UDXF). This publication also contains an extensive list of letter beacon frequencies, both current and historical.

A short summary from Numbers & Oddities MX file is added here.

"Numbers & Oddities" a.k.a. the "Spooks Newsletter" is a newsletter for the members of the Utility DXers Forum (UDXF), the Spooks mailing list, HF Underground and everyone else who is interested in Numbers Stations. "Numbers & Oddities" covers the fascinating world of Numbers Stations and all kinds of other odd signals on HF.

The beacons are on the air since the late 1960s. Until the late 1980's these beacons could be heard on numerous frequencies throughout the SW spectrum. After the disintegration of the Soviet Union, many of them disappeared and only a few survived. Some of them are very active, especially station "P".
What is their purpose? you might ask. Well, there are a number of theories; amongst them are several weird ones. Some say that they are river beacons, others state that the beacons are in fact UFO homing beacons. One person suggested that the beacons are part of the Russian strategic missiles network. He thinks that the Russians would launch their nuclear missiles when the beacons stop. Well, that certainly is not the case.
It is widely believed that the so called "cluster beacons" are propagation beacons. A Russian naval radio officer told me once that the cluster beacons belong to the Russian Navy. That was the confirmation of a theory that many dxers had for years.
The beacons that we hear today are either propagation beacons or channel markers. 

"Cluster" beacons because they transmit in clusters, groups of frequencies only a kHz apart. The cluster frequencies are 3594, 4558, 5154, 7039, 8495, 10872, 13528, 16332, 20048 kHz. A typical cluster looks like this:
Cluster beacon slots:
.7 "D", Sevastopol
.8 "P", Kaliningrad
.9 "S", Severomorsk
.0 "C", Moscow
.1 "A", Astrakhan
.2 "F", Vladivostok
.3 "K", Petropavlovsk Kamchatskiy
.4 "M", Magadan

Example of a cluster:
"D" - 8494.7
"P" - 8494.8
"S" - 8494.9
"C" - 8495.0
"A" - 8495.1
"F" - 8495.2
"K" - 8495.3
"M" - 8495.4

The majority of the other beacons are channel markers.


11 July 2014

Logs: 1-13 July

00017.2    SAQ    :    Grimeton, S    1430    CW ID SAQ        2-lug
02857.6    unid    :    (prob NATO stn)    1916    Stanag-4285/1200L crypto        1-lug
04560.0    TAH    :    Istanbul Radio, TUR    2047    CW/ARQ ID        8-lug
04798.0    5ST2    :    Russian Military Duplex , RUS    2058    CW radio check with outstations        1-lug
05065-0    MB9    :    Malaysian Navy, MLA    1819    CW in progress        7-lug
08864.0    :    :    Gander Radio, CAN    2201    USB wkg a/c        10-lug
08906.0    :    :    Santa Maria, Azores    2149    USB wkg a/c        10-lug
08939.0    :    :    Sankt Peterburg Volmet    2128    USB YL in Russian        10-lug
09025.0    CRO    :    USAF Croughton, G    2150    ALE/USB sndg        10-lug
09038.0    TSCP    :    US Army Camp Bondsteel, Kosovo    2155    ALE/USB sndg        10-lug
09219.0    BB2    :    Israeli AF Palmachim Air Base 160st Sq., ISR    2017    ALE/USB sndg        3-lug
09219.0    AAA    :    Israeli AF HQ/NCS Tel Aviv, ISR    1741    ALE/USB sndg        3-lug
09219.0    BB3    :    Israeli AF Palmachim Air Base 161st Sq., ISR    1716    ALE/USB sndg        3-lug
09999.0    :    :    Observatorio Nacional Rio de Janeiro, BRA [?]    2204    USB time signals        11-lug
10051.0    VFG    :    Gander Volmet, CAN    2156    USB Aviation weather conditions        11-lug
10872.0    C    :    C MX Beacon Moscow, RUS    2150    CW channel marker        11-lug
11297.0    RLAP    :    Rostov Volmet, RUS    1250    USB Aviation weather conditions YL in Russian        12-lug
12209.0    3181    :    Turkish Civil Defence Kankiri, TUR    1821    ALE/USB sndg        4-lug
12590.0    :    :    Unid Russian Mil    1342    BEE/50/200 idling        4-lug
12753.0    RCV    :    Russian Navy Sevastopol, UKR    1204    CW duplex "RMBB DE RCV QSA3 K" "RMBB DE RCV QTC? K"        13-lug
13044.0    RCV    :    Russian Navy Sevastopol, UKR    1157    CW "RMBB DE RCV QRR3 QSX 12444 K"        5-lug
13044.0    RMBB    :    Russian Navy    1157    CW "RCV DE RMBB QRR3"        5-lug
14581.0    RDL    :    Russian Navy Smolensk, RUS    1205    BEE/36-50/200 Sync 0x1eb41eb2952        7-lug
14630.0    :    :    Dept. of State Comms Moscow, RUS    1405    SERDOLIK/USB tonecalls/msgs        12-lug
14646.0    GML6    :    Russian Military Duplex    1305    CW "GML6 4 T7 34 6 17 T5 4T7= Z C J 6 T2 = K"        6-lug
14655.5    :    :    Dept. of State Comms Moscow, RUS    1355    SERDOLIK/USB tonecalls/msgs        12-lug
15988.0    DDK7    :    German Meteorlogical Service, Hamburg GER    1350    FSK/50/450 cq cq cq ddk7 ddk8        6-lug
16114.0    :    :    Enigma XPA2    1419    MFSK        12-lug
16207.0    :    :    Russian Navy    1345    BEE/50/200 Sync 0x1eb41eb2952        8-lug
16240.0    1317    :    Moroccan Civil Protection, MRC    1350    ALE/USB sndg        7-lug
16240.0    13262    :    Moroccan Civil Protection, MRC    1334    ALE/USB sndg        7-lug
16331.7    D    :    MX Beacon Odessa/Sevastopol, UKR    1421    CW "D"        7-lug
18279.2    :    :    Mil    1421    STANAG-4285/600L crypto tfc        12-lug
20047.9    S    :    MX Beacon "S" Sevoromorsk, RUS    1346    CW "S"        1-lug
20400.0    L02    :    China Diplo, CHN    0527    ALE/USB clg A92        2-lug
20423.0    XSS    :    DHFCS Forest Moor, G    1242    ALE/USB sndg        1-lug
22387.5    SVO    :    Olympia Radio, GRC    1355    SITOR-B news in Greek        4-lug

3 July 2014

receiving Grimeton SAQ Radio Station ... .- --.-

(da wikipedia.org) La Stazione radio di Grimeton è una stazione radio VLF che si trova nei pressi di Grimeton, un villaggio della municipalità di Varberg, nella contea di Halland, in Svezia. Venne costruita nel 1923 e possiede l'unico alternatore di Alexanderson funzionante del mondo. Per l'irraggiamento del segnale vengono usati dei cavi aerei posti su sei torri d'acciaio alte 127 metri, simili a giganteschi piloni.
La stazione radio venne usata fino agli anni cinquanta per la telegrafia transatlantica verso la centrale radio situata a Long Island, negli Stati Uniti. In seguito venne usata fino al 1996 per la trasmissione di ordini verso i sottomarini.
Nel 1968 venne installato un secondo trasmettitore che, al contrario dell'originale che funziona ad una frequenza di 17.2 kHz, si avvale di una tecnologia a base di valvole e transistor che funziona ad una frequenza di circa 40 kHz, anche su usa la stessa struttura aerea. Nel 1996 questo apparato divenne obsoleto ed andò fuori servizio, ma essendo in buone condizioni venne dichiarato Monumento nazionale. In occasioni speciali, come il giorno dedicato annualmente ad Ernst Alexanderson (inventore dell'alternatore), viene utilizzato per trasmettere brevi segnali in Codice Morse sulla frequenza di 17.2 kHz. Il suo segnale di identificazione è SAQ (... .- --.- )
La stazione radio è aperta al pubblico durante l'estate. Il 2 luglio 2004 essa venne inserita nell'elenco dei Patrimoni dell'umanità dell'UNESCO.

le antenne di SAQ

 L'ascolto e' stato effettuato il 2 Luglio 1400-1435z in occasione della extra-transmission per celebrare il decimo anniversario del  World Heritage appointment.

Condizioni di ascolto
- Rx: Elad FDM-S1/SW2
- Ant: pa0rdt miniWhip

1 July 2014

Logs: 25-30 June (CW only)

05221.5    :    Russian Air Defence, RUS 2245 CW GT24 JI?TII??
09996.0    RWM:    Moscow, RUS 1307 CW RWM RWM RWM
10543.0    RCV:    Russian Navy Sevastopol, UKR 1450 CW RIP90 DE RCV QTC 498 9 24 1326 498 = NAWIP 032 1393 ...
12934.0    HLG:    Seoul Radio, KOR 20:30 CQ CQ CQ DE HLG HLG HLG QSX 12MHZ K
14556.0    RIW:    Russian Navy HQ Moscow, RUS 1430 CW EMV DE RIW K QYT4 QSX 830 K
16047.0    3QQI:    Russian Military , RUS 1404 CW 3GDS 3GDS 3GDS DE 3QQI 3QQI QYT QBE K