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1
Spy Numbers / Re: XingXing guangbo diantai 1 (V13)
« on: July 15, 2020, 0058 UTC »
For the most part numbers stations are a passing interest for me.  I mean, if I am setting at the radio I may try to catch one that I know will be on the air, but I don't really pursue them.  The exceptions are V24 and V07, both of those I record / look for attempting to catch every transmission.  The same with V30, when it was active.

I tend not to use remotes for the stations I focus on.  Nothing against remotes, and I use them to catch what can't be caught directly here, but when I am looking hard at a station it tends to be a station I can receive first hand.  And that is why I looked hard at the 1200-1330z V13, because that is the time period I catch here first hand.  I guess I should look for the 0000 - 0400 time slots, just to see how well they are heard here.

The lack of consistency on V13 is very odd to me, and pretty much the only reason I focused on it recently.  It just does not make a lot of sense.  Of course, the V30 activity, sending the same message on apparently random days for months on end, was probably why I paid attention to that one.

T!

2
Utility / Re: 11175 callsigns
« on: July 13, 2020, 1257 UTC »
Keep in mind there are also daily rotating callsigns, and no one will have a list of those.  These are randomly selected callsigns that change at 0000 UTC every day.  When you hear an EAM (coded numbers and letters) or similar message on 11175 kHz (or any HF-GCS frequency) the callsign used will most often be either a group callsign (such as MAINSAIL) or one of these daily changing callsigns.

T!

3
Spy Numbers / Re: XingXing guangbo diantai 1 (V13)
« on: July 13, 2020, 1243 UTC »
I've been spending alot of time lately on various Japanese remotes trying to copy JJY (I've always wanted to copy the English language news fax and have never been able to even come close from my QTH in Missouri)  while waiting I've stumbled across V13 a few times
I'm my local mornings:
July 9. 9276 KHz 12:01-12:26 under strong FEBC on 9275. Also on at:

12:30 - 12:55, actually starts a minute late and goes a minute long 12:31 - 12:56

13:00 - 13:26. I missed the start but the sign off was at 13:26 so sign on was likely 13:01

13:31 - 13:56

Over the last few months I have received and recorded essentially every V13 transmission on 9276 kHz and 7502 kHz in the 1200, 1230, 1300, and 1330z time slots.  I have done this trying to determine if there is a pattern to what days / times what frequencies or combinations of frequencies are used.

After 3 months of looking, I will have to say it appears there simply is not a pattern.

Most days 9276 kHz (and 15890 kHz) is used in the 1200z and 1230z time slot and 7502 kHz (and 13974 kHz) is used in the 1300z and 1330z time slot.  However, it is not always that way, and there seems to be no pattern to the variations from this.

I have seen days with no transmissions at all, although only a very few such days.  I have seen days with the "normal" 9276 kHz at 1200/1230z and 7502 kHz at 1300/1330z.  I have seen days inverted, so that 7502 kHz is during 1200/1230z and 9276 kHz is 1300/1330z.  I have seen days when 1200/1230z transmit and 1300/1330z does not.  I have seen several days when 1200z does not transmit, but all three other time slots, 1230, 1300, and 1330z, all do.  I have seen days when 9276 kHz was used in all four time slots, and other days when 7502 kHz was used in all four time slots.

I have seen one day when both 9276 kHz and 7502 kHz were used simultaneously and in all four time slots, 1200/1230/1300/1330z.  But with different traffic on each freq.

As for start times, they seem to vary a bit.  Two months ago the start times were slightly before 1200/1230/1300/1330z, say 20 or 30 seconds before the top and bottom of the hour.  Today 9276 kHz started at 1201:36z.  It is as if the clock they are using looses a couple seconds a day, and no one has resynced the clock in a while, so the start time has gotten later and later since the last time it was synced.

All on 9276 KHz H3E. With very strong FEBC all but obliterating the signal. During the occasional lulls in FEBC I could see some modulation on LSB. Not enough to be considered full AM but not fully suppressed either. Sometimes the carrier is dropped in the 5 minutes between broadcasts. This happened at 12:26 but didn't happen at 12:56. Carrier was dropped at 13:26 also. Not heard on usual parallel 7502 KHz.

The mixture of H3E and full DSB AM seems somewhat random.  9276 kHz is sometimes, possibly most often, H3E and sometimes full AM.  7502 kHz is normally full AM but sometimes is H3E.

The carrier on / off between messages seems to be frequency dependent.  Typically 9276 kHz will turn off the carrier between messages, but 7502 kHz seldom does.  If I had to guess, and it is clearly just a guess, it may be that different people/techs may be running each transmitter, and one person turns it off between messages, the other person does not.  There are other minor activities that may support this, such as transmitter tuning for each frequency.  It just feels like they (the two transmitters) are not run by the same person.

You said "Not heard on usual parallel 7502 KHz".  7502 kHz is not in parallel with 9276 kHz.  In the past 2+ months I have seen them both active at the same time only one time, and that time they had different traffic on the two frequencies.  Typically there are at least two frequencies active at any one time, but it is not 9276 / 7502 kHz.  Most often when 9276 kHz is active you will also find the station on 15890 kHz.  And when 7502 kHz is active you will also find 13974 kHz active.  However, these second outlets are not carrying the same program, 9276 / 15890 kHz may be active at the same time, but different traffic on each, the same with the 7502 / 13974 kHz pair, active at the same time but different traffic.

T!

4
How often are you seeing these signals?  These are not the same (at least, I think they are not) as the Pips network, however I think I have seen the same signals you are talking about, the modulation you mention is familiar, but on different freqs.

T!

5
This is PBB, a Dutch navy station.

850 Hz shift, 75 Bd, FSK.  And it is not encrypted, you should be able to turn it to clear text.  I don't remember off the top of my head, but try 850 Hz shift, 75 Bd, 5N1

The results might look odd to you, but should be the same line repeating every transmission cycle, something like:
02A  04B  06A  08B  12A  PBB

T!

6
HF Mystery Signals / Re: 9977 kHz at ~6kHz wide Data?
« on: June 19, 2020, 1517 UTC »
Honestly, to me that does not look like data to me, it looks like a carrier modulated with a 325 Hz tone.  Alternately, it could be FMCW of some kind, sinusoidal, sawtooth, etc, with a 325 Hz modulation rep rate.

T!

7
During the local "big" (coordinated effort resulting in about ~1000 marchers) gathering here a week ago there was reportedly an MQ-9 Reaper overhead the entire time.  If true it may, or may not, have been related to the protest, they are often overhead here anyway.

T!

8
Equipment / Re: What are you using for SWLing?
« on: June 02, 2020, 1615 UTC »
I have a Realistic DX-300 which is nice at times, but impossible to use if for SSB - it drifts like an unmanned boat on a swift river.

I almost got a DX-300, but missed out on the auction. Then I was going after a DX-160, and then DX-150, and outbid again.
But I managed to get a DX-392, and then Sangean ATS-803A in good price.  These are great receivers I find. They are very sensitive, stable and sounding good.

I am shocked to hear nice looking DX-300 is such a bad performer drifting too much to hear SSB.  Should I be glad that I missed them out, or is your DX-300 a lemon?

I find the DX-300 acceptably stable on SSB if you let it warm up for a while before hand.  For sure for the first 30-40 minutes it is all over the place, but it does stable out a bit after a while.  It kind of depends on what your reference is, compared to radios I started with the DX-300 is OK, accpetable, but not great.

In my collection I have most of the DX series desk top radios, DX-75, DX-100, DX-150, DX-150A, DX-150B, DX-160, DX-200, DX-300, and DX-302.  The only two DX desktops I don't have that I can think of off the top of my head are the DX-120 (never have had one of those) and the DX-394 (have had one before).  For sure the two best are the DX-160 and DX-302 (I never liked the 394, but that is probably just opinion based, I never liked the look), but really, except for the DX-100, they are all pretty similar in basic performance, even when very different in features and appearance.

What do I use for SWL today?  I am more of a Utility guy, but I do SWL a bit, most often one of my local SDRs when searching, but if I am just letting a radio set on a station it might be one of the boatanchors, the Hallicrafters SX-42, SX-71, and 62A are all favorites, but the National NC-183D is also something I like to hear.  I rotate which baotanchors are beside the listening desk, so really it depends on what is in the living room at the time.  The other day I had a Hallicrafters SX-16 out that I was listening to VoK on.

T!

9
The local police station where I live went encrypted years ago so I can't listen to them, however I can listen to the Victoria Police Department and the Sooke RCMP as they are digital and in the crest system.

Almost nothing is encrypted here, and only a little is digital.  You can still grab 90+% of the stuff around here with a Pro-2004 ;)

Local PD has one analog FM channel and one digital channel, but it is not encrypted.  They speak on it at times like they think it is secure, I wonder if they think it is?  The local mil base went digital and secure for base operations, but the base PD and FD are still analog and clear.  All of the county agencies around are analog and in the clear.  The county SWAT unit has a digital and secure channel.  That is about it.

Basically I can hear almost everything for a 90 mile radius, with only a couple of channels that I can't get.  We are behind the times here, kind of very 1990's in comms here.

T!

10
This is the kind of activity that pushes public service to digital and encrypted.

And while I am totally against banning any kind of radio from private ownership, this is also the kind of activity that gives strength to regulations on what can and cannot be sold in the country.

T!

11
I suppose it depends what one means by "numbers station." I know the classic ones are pretty much Cold War entities.

I think it is a soft line of were "numbers stations" end and where other types of coded traffic begin.

Personally, I put suspected "spy" oriented, or external intelligence oriented, stations in the numbers station realm, and coded military traffic, or internal to the source country, stations not in that realm.  Of course, then the problem is that various external intelligence agencies might be run directly by the military, use the militaries techniques / habits, etc.  And it can get pretty fuzzy at that point.

Examples would be something like Chinese V16 and V22, stations going back to at least the early 90's and probably before.  The Chinese numbers station V16 and V22 were pretty clearly in the "numbers" categories to me.  Sure, no one ever had any kind of confirmation that those stations were aimed at external targets, but the times and frequencies made it pretty likely.  But then V16 and V22 were replaced by a digital modem, initially (but no longer) in existing V16 and V22 time slots.  That digital modem was identical to one being used by the Chinese military.  That modem is now seen on various frequencies and times with somewhat regular schedules, are these still V16 / 22 replacement signals or are they unrelated military signals?

T!

12
Was installing cabinets and just stopped for the evening, checked the band and WDDR in nicely, well worth the break in work.  S9 or so here in the Mojave Desert of California.  Sounds good on the house sound system.

T!

13
I moved your post to this forum as it covers VHF/UHF things more, and people are more likely to see it here.

Yesterday there were some significant openings in VHF.  If this was not a local station or pirate it is possible that some distant station was heard.

T!

15
Just an FYI, this signal was last on the air on April 24, the day I put up that video on my YouTube channel.  Or at least that was the last time I saw it, and I checked every evening.

Until this morning, May 4.  The signal was observed on 9024 kHz, normal mode and content, before 0300 UTC.  At 0457 UTC it switched from 9024 kHz to 9008 kHz, same mode and content.  It turned off at off 0601 UTC.  I don't believe I have ever seen it shift frequency like that before, although it has used both those frequencies in the past.

Again, these frequencies are "close" to Link-11 freqs.  The entire time the signal was on 9024 kHz there was a Link-11 on 9022 kHz.  Although I did not see it active at the time of the frequency switch, by the time 9008 kHz went off the air there was a Link-11 on 9007 kHz.  I have no idea if the Link on 9007 kHz was there the whole time or not, and if propagation was just preventing me form seeing it at first.

T!

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