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1981
Shortwave Broadcast / Re: firedrake wiki page
« on: November 17, 2011, 0150 UTC »
How often do they change frequencies?


Firedrake changes frequency as often as the stations they are jamming do.  Plus, through the day, they adjust frequency to stay on top of the jammed stations.  In general they seem to target external service broadcast that are in Chinese and aimed at China.

Another habit to be aware of, sometimes listeners go looking for Firedrake and do not find it, but know it was on just a few minutes ago.  At the top of each hour all Firedrake frequencies go off the air.  The time they come back on the air varies, but generally between 10 and 20 minutes after the hour they start to come back on.  So it is normal to not find any Firedrakes at all from top of the hour to about 10 minutes after the hour.

I assume the operators are using this time to line up the target frequencies and to make sure they (the target stations) are still on the air in their time slots.  In the jammer world this is sometimes called "look through time".

I have seen Firedrake up on 10 or more frequencies at one time.  As a general rule when the frequencies come back online after their look through at the top of the hour they come up one at a time, sometimes with up to 1 minute between each frequency, and starting low and bringing on the next higher frequency in sequence in the set, with one exception.  It is quite common, but not universal, to see the lowest frequency come up last after all the higher frequencies have been activated.

T!

1982
I listened to the recording of the numbers broadcast. I don't think I have heard this before, but beyond that, why is it presumed to be a parody? Perhaps if you could decode a funny message out of the numbers, that would be a give away, but as far as I could hear it seemed rather representative of real broadcasts.

My main reason for leaning towards spoof is the fact that it kind of includes too many features of a numbers station, like it was built from a check list.

- Odd, distinctive, music for lead in?  Check.  Digital readouts on receivers and digital watches/phones, the need for such distinctive music is long past.

- Some kind of identifier at the start, for recipient and source?  Check.  The music itself did not identify the source?  Sure, maybe the recipient needs to be IDed assuming more than one possible recipient.

- None-English/American accent but message in English?  Check.  If this voice is synthesized why not just use an English/American accent voice if the message is in English.  If the recipient is not a native English speaker then why not send it in his native tongue?

- 5 figure groups?  Check.  Well, this one is kind of standard and hard to argue.

- Including something to define the group edges?  Check.  Most stations just allow a pause to identify group edges, this one goes overboard with a stroke between each.  Sure, the stroke (or “oblique”) is used in other stations, but not between each 5f, it seems overkill.

- Repeat the numbers group as a body twice?  Check.  Smart, but again VERY numbers stationy.

- Saying "I'll repeat" or something like that between the two message bodies?  Check.  Again, smart, but very “exemplary” of how a numbers station might sound.

- Include a group size someplace in the message?  Check.

- End message by saying end?  Check.

It just seems like too much for one station in my opinion.  I can think of no other station today that combines all of these features so glaringly.  Most have several, maybe even most in some form, but not all of them exactly like this.  I guess they could have added one more just to make sure, zero’s after the “ende” or something like that.

Yeah, I am not 100% sure either, but I did log it as “probable spoof”.  I also, however, put a copy of the recording in my unidentified numbers station storage folder.

For that matter, did we ever decide for sure that the AH7 station from last year was a spoof?  I don’t remember ever hearing about anyone owning up to it, and there was half a dozen or more messages total sent.  That one could have been real I suppose, but again it just did not feel right.

T!

1983
I missed any usable recording of the first transmission on 6930 at 0328, it was just too weak here to really make anything out and I also started listening a bit late.  However, for the 6935 transmission at 0345 I was on a remote Perseus in Washington state and noticed the transmitter hum come up just before the audio started, so I got a complete recording of that transmission both locally and at the remote.  The remote was much more clear.

From Chris's recordings it sounds to me like both messages are identical.  Also, from my recording I am pretty sure there are no letters in the groups, it sounds like all numbers to me.  However, the number 5 has an odd pronunciation, kind of like it is being said "fife-eh".

My recording here (from the Washington state remote): http://www.youtube.com/watch?v=s6aUWchUo6k

I have thrown this one in my logbook as "probable spoof/pirate", but in my opinion it is less sure as a spoof than last year’s "AH7" transmissions.  I was kind of hoping for more of those signals ;)

T!

1984
Utility / Re: 500ms tick on 23856u
« on: October 31, 2011, 2121 UTC »
I don't believe that it is local noise. It doesn't fade. I'm able to receive it well day and night. It doesn't seem to be an image or birdie or something like that.

Here is what I analyzed from my recording of about 18 hours (first continuous tone captured ~0858z Oct 28th UTC).

Several clues there.

"It doesn't fade"  Propagation and fading are normal for a signal on HF that travels any distance at all, this means that at the farthest you are still in ground wave.  Pointing towards local.

"I'm able to receive it well day and night"  At that frequency you should absolutely tell a difference between day and night if it is any distance at all.  At night that frequency should shut down to all but direct path.  Again, pointing towards local.

First capture at about 0857z and watched for the next 18 hours.  It kind of depends on your location, but in the US that means you picked it up on almost 24 MHz at between 0200 and 0500 local, before sunrise, definitely a bad time for that freq and any propagation.  You kept it through the daylight hours and until about midnight, definitely uncharacteristic of any distance again.  If in Europe you picked it up in daytime and kept it through the entire next night, again not likely for anything not local.

I would have to say it is something local.  And by local I would say to the visual horizon or a tad more.  It could be local in the neighborhood or it might be 25 – 30+ miles away.

T!

1985
Spy Numbers / Re: Possible V13 Logging 13200 USB
« on: October 31, 2011, 2106 UTC »
Yep, V13, I think you got it on the first or second day of its new frequency.

One has to wonder how long it will stay on that freq, the US and Taiwan have pretty good relations, I bet the AF will be talking to State, and State will be talking to Taiwan.

T!

1986
Spy Numbers / Re: OM #s in EE 6797kHz 033+ 10/30/2011
« on: October 31, 2011, 2104 UTC »
Yes, this is the station that carries the Enigma 2000 designator E06, nicknamed "the English Man".  It has been on for the past two nights on that freq, but I do not think it will be on tonight inn that time/freq slot.

T!

1987
Spy Numbers / Re: V02a on 5883 kHz, 12 Sep 2011
« on: October 31, 2011, 2059 UTC »
As a general rule, all things HF and radio are UTC.  This means UTC time and UTC date.  In fact all of my radio related PCs are on UTC, none on local time.

T!

1988
Spy Numbers / Re: 7077 kHz
« on: October 14, 2011, 1940 UTC »
The ID is in the digital stream, they are indeed IDing but you will not hear and identify the ID by ear.  And those modes and frequencies are in use by hams someplace in the World around the clock, so signals are pretty much always there, even if you are not receiving any at your specific location.

You might try MultiPSK or FLDGI, both of those pieces of software can be used with your sound card to decode digital information, depending on the mode.  There are literally thousands of possible digital modes, hundreds that are common, and no one software will decode them all but between those two softwares you can cover most of the more common modes.

By the way, the digital signal sounding like any specific song is accidental, it is just a data stream.

You might check into the #wunclub IRC chat for real time help identifying signals (the link to the Java access can be found at the bottom of the front page of this site, http://www.hfunderground.com/wiki/Main_Page but if you have an IRC client it is a bit better).  Quite often there will be people in there who can give you some direction on what a signal might be, and it being a real time chat they can tune to the signal to make sure.  But, if you do go there, be aware that just because you see names of people in there it does not mean anyone is actually at the monitor.  Many people leave that window open 24 hours a day to log other peoples reports, but might only be present a few hours a day at most.  And the activity tends to swell and ebb as different people get off work or go to work.

T!

1989
Spy Numbers / Re: 7077 kHz
« on: October 14, 2011, 0241 UTC »
This is the ham 40 meter band, and specificaly the section used by digital modes, right now I am watching 10+ signals in that range (7077 +/- 3 kHz), I see Olivia, WSPR, and JST65, any one of those might be what you are describing, without more data or a recording that is as good an ID as it is going to get.

T!

1990

I'm writing a paper on the amateur radio community (especially number stations listeners) and was wondering if you guys would answer a question or two. Everyone will be kept anonymous (unless you ask not to be).
What is the best and worst part of listening to number stations and why?
Any answers will be greatly appreciated.


You are citing two different communities.

“Amateur radio” specifically is generally accepted as the “ham” community, licensed radio operators who both transmit and receive on a variety of frequencies in many different portions of the radio spectrum, from below 2 MHz to over 300 GHz.

Numbers station listeners are generally part of the “short wave listening” (SWL) community, albeit a portion of the SWL community that concentrates on a specific type of transmission, numbers stations.  Other SWLs may concentrate on military communications, ships at sea, aviation communications, etc, these listeners fall in a subcategory sometimes referred to as “utes”, for the “utility” communications they monitor.  Other SWLs concentrate on short wave broadcast stations (BC), programming from commercial or state run BC stations that are similar to what might be heard on the AM or FM broadcast band. SWLs are not licensed in any way and cannot transmit on the frequencies they monitor.  It is possible for a ham to also be an SWL, but an SWL does not have to be a ham (amateur radio operator).  I am both a ham and an SWL, and while I follow numbers stations I would say I spend more time on utes than numbers.

Also, it might help to know the country you are referring too.  In the USA it is legal to monitor numbers stations, some other nations do not allow this activity.  Some nations consider it not allowed by law/regulation/statue, but do not enforce the policy.

The best and worst part of numbers station listening?  That is going to be a very opinionated response.

For me the best part is the hunt.  I look for and follow numbers stations that other people are not generally listening to.  For years the majority of organized numbers listeners have been based in Europe.  In the US there have been many numbers listeners also, but generally less organized and more “freelance”.  This has resulted in the majority of documented numbers stations being ones that are heard best, most easily, in Europe.

Since most of the European numbers stations are well known I tend to concentrate on the Asian numbers stations.  Stations from Taiwan, the PRC, Vietnam, Korea, and others, but also European numbers stations that might be based out of Asiatic Russia and points further east.

The hunt for numbers involves finding the frequencies, times, and operating habits of the station.  These are going to be variable depending on locations of both transmit and receive locations and the requirements of transferring data to the recipient.  The habits can tell you a lot about what is probably going on.  It is kind of like a puzzle.

But what started me listening to numbers stations (in the 1960’s) was the mystique, particularly at that time in the Cold War.  The mental image of spies and handlers working their tasks for their homeland (whichever side that might be).

For me the worst part is the not knowing.  Yes, you can gather data on where (very generally) the message might be received, where it might be transmitted from, what the uses might be.  But, you can never be sure, and you for sure are never going to read the message.

On the other hand the not knowing, the enigma of it all, is a draw all to itself.  Maybe there is no “worst” point to numbers listening?

T!
Mojave Desert, California, USA

1991
Hello all,

I have a new schedule up for predictions of transmissions of the Korean language numbers stations V24 and M94 at http://home.mchsi.com/~token_radio/Sched_V3_Jul2011.JPG  Keep in mind that these stations make minor changes all the time, so I will not claim the schedule is 100% accurate, but excluding transmission errors (V24 averages about 6 or so "error" transmissions, wrong time or freq and message not repeated, each month) I bet it is 80+%.

M94 has reduced operations to just 4 transmissions per month, I think it is safe to say it is on its way out.  This station did more than 28 transmissions per month in 2009 and each year since has shown reductions.

Some V24 time slots are used every other month instead of every month.  So, if you try a time/frequency combination and nothing is heard there are three possibilities; you have no propagation to the region, the station is going to use that time slot next month, or V24 changed its schedule...again.

I hope you find it helpful,

T!
Mojave Desert, California, USA


1992
North American Shortwave Pirate / Re: WPOD 6925 July 4 show
« on: July 04, 2011, 0412 UTC »
10 over S9 here for the most part, occasional 20 over peaks.  Very strong in the Mojave Desert of California.

T!

1993
Spy Numbers / Re: Cuban Number Stations
« on: June 10, 2011, 0139 UTC »
Here San Luis Obispo, California I have:

hehe....I drove through SLO yesterday morning (June 9) on my way to Palo Alto for a review on a new TWT my company is having built  (I grabbed one of the convertibles and drove over from the High Desert to the coast, so I could drive up the 1, and then found out the 1 was closed north of San Simeon...DOH!).  Thinking of your conditions and knowing that the approximate time I was going to be traveling through there was good for V24, V26, V13, and VTN I took a portable.  I stopped on the coast just north of Morro Bay and did a little tuning around for a while.  I got V26 (7553 kHz USB), V13 (9725 kHz AM/USB), and VC01 (7684 kHz LSB), but did not hear anything from V24 or VTN.

T!

1994
Utility / Re: UNID 6738.6 USB
« on: June 07, 2011, 0236 UTC »
The actual frequency is 6739.0 USB.  It is part of the HF-GCS (High Frequency Global Communications System).  It is military, it can be accessed by any US service but is predominantly US Air Force.

There are sites located all around the World, and it is not unusual to hear a pronounced echo on the signal, this echo is caused by you receiving more than one station at the same time.

Frequencies to watch for this traffic are 4724, 6739, 8992, 11175, 13200, and 15016 kHz, all are in USB mode.  There are other frequencies as well, but those are the most active.  It is common, in fact it is the norm, to hear the same message on multiple frequencies at the same time.

Without more detail it is impossible to tell exactly what kind of message you heard, there are several common types, but it is quite likely it was indeed an EAM.

T!

1995
Spy Numbers / Re: Cuban Number Stations
« on: June 06, 2011, 2025 UTC »
Notes for your own information, I know you say your radio, like many radios, only shows frequency in 5 kHz steps so everything looks like it ends in a 5 or a 0.  Even so, with modern digital freq readouts you are light years ahead of old school boat anchors and portables that were sometimes lucky to show the freq within 25 kHz.

Your V02 at 0406, this should probably be 5117 kHz instead of 5115 kHz.

The actual frequency of your 5880 kHz V02 is most probably 5883 kHz.

Your 5900 kHz M08 and V02 were most likely 5898 kHz.

Your 7680 kHz SK01 is most likely 7681 kHz.

“V26  South Korean  in Progress  13:01 - 13:05 UTC  Solid  3:2/2:3 format” is a bit of a problem without a frequency.  V26 is Chinese, not Korean.  V24 is Korean.  However, both V26 and V24 were up between 1300 and 1305 on June 6, 2011.  My assumption is that you mean V24 in Korean, on 6730 kHz in the AM mode.  V26 would have been up on 7553 kHz or 9153 kHz (as well as a 4 MHz freq) but it would have been in USB.

T!

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