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Author Topic: HM01  (Read 547 times)

Offline Ary-B

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HM01
« on: April 22, 2019, 0701 UTC »
10345   22-04-2019 0558 HM01   AM/RDFT     
18253 65311 55104 83886 28556 23037 (repeating the groups of 22 Feb)

 9330   22-04-2019 0652 HM01   AM/RDFT
 Radio Habana Cuba followed by HM01 at 0656 UTC: 18253 65311 55104 83886 28556 23037 (repeating the groups of 22 Feb)

Offline shadypyro

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Re: HM01
« Reply #1 on: April 24, 2019, 2208 UTC »
Are they on repeat since Feb 22?
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Offline MDK2

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Re: HM01
« Reply #2 on: April 24, 2019, 2226 UTC »
Are they on repeat since Feb 22?

If I may jump in... Yes. If this keeps up much longer I may abandon my log. Part of the fun is receiving the files but with endless repeats its just a bore. Just my 2.
Denver, CO.
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W6LVP active loop, G5RV, 20m dipole, homebrewed mag loops.
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Offline Retops

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Re: HM01
« Reply #3 on: April 26, 2019, 0313 UTC »
They are clearly not using this service to transmit operational messages very often.  They keep broadcasting to keep the channel "open" and presumably pass their traffic via some other means.  Some intelligence services have abandoned SW broadcasts in favor of other techniques, but there is nothing so totally anonymous as just broadcasting an encrypted message out that can be received over a huge geographical region.  No clues are given as to where the agent resides.

They must be maintaining this for use when other methods fail.
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Offline Ary-B

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Re: HM01
« Reply #4 on: April 26, 2019, 1647 UTC »
I don't know if anyone has heard in March and april, but I'haven't. HM01 in repeat mode since 22 Feb, so they defenitely changed something

73, Ary

Offline MDK2

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Re: HM01
« Reply #5 on: April 26, 2019, 1705 UTC »
The runaway-speculative part of my brain, the part that likes a good spy thriller, has come up with the idea that they may be sending unique files at certain times, with the sheer number of individual data transmissions obfuscating that that's occurring. But in real life there's no reason to suspect that, because any time I decide to fire up DIGTRX and check the files, they're the same ones to the best of my ability to tell. (With all the seemingly random characters encrypting whatever message they're sending, it's pretty difficult to ascertain with certainty, but any random bits that I compare always match up.) Also, the sheer incompetence often on display with HM01 makes it unlikely that they could try to do such a thing without risking it going sideways because of some operational error at the transmitter site. And finally I imagine that there are people in American counterintelligence with the thankless task of monitoring all HM01 transmissions, so nothing would escape them.

I think Retops' hypothesis is perfectly reasonable. HM01 broadcasts are a total waste of energy and only adds to the wear and tear of their equipment if it's not serving some purpose, and that sounds as good of an explanation as I've heard.
Denver, CO.
SDRPlay RSP2pro, Icom IC-7100, Grundig Satellit 750, Realistic DX-300, Tecsun PL-600.
W6LVP active loop, G5RV, 20m dipole, homebrewed mag loops.
eQSLs appreciated wickerjennie at gmail

Offline shadypyro

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Re: HM01
« Reply #6 on: April 30, 2019, 2234 UTC »
Are they on repeat since Feb 22?

If I may jump in... Yes. If this keeps up much longer I may abandon my log. Part of the fun is receiving the files but with endless repeats its just a bore. Just my 2.

I hear you! Haven't heard HM01 at my QTH lately
Tecsun PL-380, Sangean ANT-60 Portable Shortwave Antenna.