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Author Topic: Cuban spy numbers  (Read 1930 times)

Offline swl22

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Cuban spy numbers
« on: January 30, 2022, 1709 UTC »
Very active today on 11435 and 11530 at 1645-1710, with some noises in between strings. Probably a digital type marker,
Radio:Tecsun PL680, PL990x, PL368, Sangean ATS 909, XHData D-219
Antenna: MLA 30 Plus, 80 FT random wire
Location:West Coast of Florida USA

Offline MDK2

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Re: Cuban spy numbers
« Reply #1 on: January 30, 2022, 2053 UTC »
The "noise" is a digital mode called DIGTRX. It's sending files in encrypted text.
Denver, CO.
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Offline ~SIGINT~

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Re: Cuban spy numbers
« Reply #2 on: January 30, 2022, 2130 UTC »
Fabulous software actually. Too bad it is no longer maintained. The mode is robust.

Offline fpeconsultant

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Re: Cuban spy numbers
« Reply #3 on: February 01, 2022, 0156 UTC »
Yes, and the have been in repeat mode since mid September 2021.
Near Chicago, IL USA.  Drake R8, Ten-Tec RX340, JRC NRD545, Watkins Johnson HF-1000, Wellbrook loop at 28', 43m inverted vee.  Please QSL to fpeconsultant@aol.com thanks.

Offline ~SIGINT~

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Re: Cuban spy numbers
« Reply #4 on: February 01, 2022, 0311 UTC »
Repeat of the messages is common. Here are some that I have on file.

11211313   36257164
13804840   36601710
14623573   43453003
17550144   50026853
22374208   50087020
27864605   61336168
32055426   67284267
32533356   67546341
35664465   74676112

Offline Token

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Re: Cuban spy numbers
« Reply #5 on: February 01, 2022, 1434 UTC »
The "noise" is a digital mode called DIGTRX. It's sending files in encrypted text.

Small nit here.

The mode is called RDFT (Redundant Digital File Transfer), the most common software used by hobbyist to demodulate that mode is DIGTRX.  The RDFT mode was developed as a ham radio mode around 2001, and started being used by HM01 in about 2012.  Prior to HM01, the Cubans used the same RDFT (and a couple other modes, also) with HM01's predecessor signal, SK01, starting in about 2007.

There have been a couple of different beta and experimental softwares that could work with RDFT, but DIGTRX is by far the most common, and the only one that I know of that has a chance of running on a reasonably recent OS.

T!
T!
Mojave Desert, California USA

Offline fpeconsultant

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Re: Cuban spy numbers
« Reply #6 on: February 01, 2022, 1659 UTC »
New groups today after being in repeat mode since 9/23/21.
Is something pending or just RHC being RHC?
Near Chicago, IL USA.  Drake R8, Ten-Tec RX340, JRC NRD545, Watkins Johnson HF-1000, Wellbrook loop at 28', 43m inverted vee.  Please QSL to fpeconsultant@aol.com thanks.

Offline ~SIGINT~

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Re: Cuban spy numbers
« Reply #7 on: February 02, 2022, 0239 UTC »
Cuba has been a long ally of Russia and it has long been suggested that the stations are also used by Russia. Some appeared in wake of the Cuban Missile Crisis. Speculate all you want.

Offline MDK2

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Re: Cuban spy numbers
« Reply #8 on: February 02, 2022, 2133 UTC »
The "noise" is a digital mode called DIGTRX. It's sending files in encrypted text.

Small nit here.

The mode is called RDFT (Redundant Digital File Transfer), the most common software used by hobbyist to demodulate that mode is DIGTRX.  The RDFT mode was developed as a ham radio mode around 2001, and started being used by HM01 in about 2012.  Prior to HM01, the Cubans used the same RDFT (and a couple other modes, also) with HM01's predecessor signal, SK01, starting in about 2007.

There have been a couple of different beta and experimental softwares that could work with RDFT, but DIGTRX is by far the most common, and the only one that I know of that has a chance of running on a reasonably recent OS.

T!

I always welcome picking of my nits. Thanks Token.
Denver, CO.
SDRPlay RSPdx & RSP2pro, Airspy Discovery HF+, Icom IC-7100, Grundig Satellit 750, Realistic DX-300, Tecsun PL-600.
MLA-30 active loop, G5RV dipole.
eQSLs appreciated wickerjennie at gmail

Offline MDK2

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Re: Cuban spy numbers
« Reply #9 on: February 02, 2022, 2135 UTC »
New groups today after being in repeat mode since 9/23/21.
Is something pending or just RHC being RHC?

You never really know with HM01. Either they do what they do in order to waste the time of government monitors, or it's the most inept numbers station in the history of numbers stations.
Denver, CO.
SDRPlay RSPdx & RSP2pro, Airspy Discovery HF+, Icom IC-7100, Grundig Satellit 750, Realistic DX-300, Tecsun PL-600.
MLA-30 active loop, G5RV dipole.
eQSLs appreciated wickerjennie at gmail

Offline MDK2

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Re: Cuban spy numbers
« Reply #10 on: February 02, 2022, 2137 UTC »
Cuba has been a long ally of Russia and it has long been suggested that the stations are also used by Russia. Some appeared in wake of the Cuban Missile Crisis. Speculate all you want.

From what I can tell, the Russians have enough of their own systems not to need anything of the Cubans and their unreliable station. Even the Spanish Lady station (V07) seems to cover Latin America well enough. But it's all speculation as you say.
Denver, CO.
SDRPlay RSPdx & RSP2pro, Airspy Discovery HF+, Icom IC-7100, Grundig Satellit 750, Realistic DX-300, Tecsun PL-600.
MLA-30 active loop, G5RV dipole.
eQSLs appreciated wickerjennie at gmail

 


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