HFU HF Underground
Loggings => Peskies => Topic started by: secretsquirrel on July 06, 2017, 2029 UTC
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two way Traffic in AM, also 3.104 3.127, 3158
3.053 MHz AM 3053 kHz AM
3.104 MHz AM 3104 kHz AM
3.127 MHz AM 3127 kHz AM
3.158 MHz AM 3158 kHz AM
[moderator note: I have added the other frequencies listed and Siberian Village Radio 3 MHz Band AM to the thread subject line for easier searching/archiving purposes]
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3053 kHz AM? What language?
3104 kHz, 3127, 3158 kHz all AM?
2850 kHz to 3150 kHz / 2.850 MHz to 3.150 MHz is an aeronautical / aircraft band, with voice communications supposed to be in USB mode. Since you were hearing traffic in AM...I bet it wasn't aircraft comms you were hearing.
Could you give any more info about what you heard?
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I hear these Signals always in the dark on 3100 +- on AM. Language sounds like portugese, but i am not sure because the signals are weak.
In the spektrum i see that the signals swing in to their frequency for the first 500 or so ms. Perhaps these are old military tube transmitters.
I tried some of the remote receivers on sdr.hu and heard the signals stronger with receivers in sweden. http://kiwisdr.sk3w.se:8073/ for instance.
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Around what time do you hear them? I'll try and catch them on the remote SDR you linked sometime. Interesting that they're still using AM. But since you've noticed the carriers swing onto frequency when they transmit, they could be using old military radios (as you say).
If they're stronger in Sweden, I wonder if these transmissions are coming from Portuguese fishing fleets operating close to Western Europe.
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its a slavic language not portugese. they are now very strong on the swedish receiver.
The solution: http://www.udxf.nl/voices-from-the-tundra.pdf
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Awesome. The Russian version of "village radio", that matches up with the transmitters being old tube type military gear. Interesting that the article mentions use of SSB and narrow band FM (NFM or NBFM) in addition to regular old AM.
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Even better: http://nsk.swl.su:8073/ or http://msk.swl.su:8073/
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Thank you for the additional web SDR links, I've added them to my "international SDR" bookmark folder.
I am currently (1800 UTC) switching between the Swedish remote SDR (SK3W KiwiSDR) and the Russian one in grid square NO14nv.
There are several AM QSOs going on at the same time around 3 MHz. One very strong (S9+10) signal around 3152 kHz (the transmitters are not all on exactly the same frequency). The powerful one is on 3152.1 kHz, and the one he's talking to (S8 signal) is transmitting on 3152.7 kHz. But that doesn't matter with AM anyway. A third station is on 3152.3 kHz. Speaking Russian. Very informal sounding. Sort of reminds me of the Russian taxi traffic heard in the 25-30 MHz area, only a bit more "laid back" and only OMs are heard. The 3152 kHz stations were consistently the strongest and most active at least in the 1800 + UTC time frame.
Other frequencies noted on the SDRs, all in AM mode:
3022 kHz - 3022.1 kHz, weak AM voice traffic heard
3050 kHz - 3048.9 kHz, 3050.0 kHz, 3050.8 kHz (with drift from 3050.6 kHz to 3051.0 kHz)
3055 kHz - 3055.3 kHz
3060 kHz - 3059.5 kHz, 3060.1 kHz, 3061.0 kHz, also with lots of drift
3077 kHz - 3076.8 kHz, weak station causing QRM to SSB traffic on 3075 kHz
3082 kHz - 3081.1 kHz, 3081.5 kHz, 3082.4 kHz, 3082.5 kHz, all seemed to be talking to each other (lots of frequency drift!)
3084 kHz - "main" station is on 3083.7 kHz, but another AM carrier was noted on 3084.1 kHz w/data link QRM
3098 kHz - another weak net here, 3097.8 kHz, 3097.9 and 3098.1 noted
3110 kHz - 3110.1 kHz, 3110.4 kHz, etc - weak, but active QSO heard
3112 kHz - 3111.7 kHz, weak but readable AM audio here (much weaker than the stations around 3114 kHz)
3114 kHz - 3113.8 kHz (somebody doing a radio check, powerful S9 to S9+10 signal)
3126 kHz - 3126.1 kHz, 3126.2 kHz, the station on 3126.2 kHz was very loud, strong S9 signal
3136 kHz - 3136.1 kHz - much weaker
3140 kHz - only one station logged here
3142 kHz - 3141.9 kHz, but weak.
3152 kHz - 3154 kHz - 3152.2 kHz, 3152.5 kHz - very strong. Possibly the same "net" as the 3153.9 kHz an 3154.2 kHz stations
3154 kHz - 3153.9 kHz, 3154.2 kHz, AM QSO in progress, later noted a signal on 3154.8 kHz and 3155.5 kHz (S9+20db!)
3160 kHz - signals on 3159.9 kHz, 3160.6 kHz, and a very strong signal on 3159.6 kHz
3163 kHz - signals on 3162.7 kHz, 3163.1 kHz
3196 kHz - 3195.5 kHz, 3196.0 kHz both noted (weak)
3210 kHz - 3210.3 kHz, 3210.4 kHz, 3210.5 kHz
Many of them exhibit the "swinging onto frequency" characteristic secretsquirrel noted, sometimes to an extreme amount.
SSB traffic noted on the following frequencies, also in Russian (or Russian sounding language)
3075 kHz USB - scrambled traffic, similar to 3178 kHz (with AM heterodyne QRM from 3076.8 kHz)
3178 kHz USB - scrambled traffic, possibly fishing fleets? Russian fishing boats have been known to use analog "scramblers"
3270 kHz USB - OM and YL having a QSO, S7 to S9 signals with good audio for both stations
CW traffic noted on:
3246.5 kHz - strong signal, heard clearly underneath Pyongyang Broadcasting Station / PBS North Korea DPRK PBS on 3250 kHz
Broadcast stations noted on the following frequencies:
2850 kHz AM - Korean Central Broadcasting System KCBS Pyongyang - Pyongyang transmitter 50 kW - very good signal
3250 kHz AM - Pyongyang Broadcasting Station - but bad copy due to heterodyne QRM from 3255 kHz AM and CW on 3246.5 kHz
3255 kHz AM - BBC via Meyerton transmitter (100 kW) - S2-S3, weak with heavy QRM from North Korea PBS on 3250 kHz
3320 kHz AM - Pyongyang Broadcasting Station - North Korea / DPRK (Korean language) - same broadcast as 3250 kHz
3480 kHz AM - Voice of Korea, S9+20 signal good audio, het QRM from carriers on 3478.9 kHz, 3479.5 kHz and odd signal on 3485.2 kHz
3485 kHz AM - UNID, S7 signal, "wobble" sound, possibly a jammer? (frequency is closer to 3485.2 kHz)