January 07, 2016 08:22PM
[Posting for reference here. --Lw]

** CUBA. Following up this unID I reported: ``UNIDENTIFIED. 6870.0-AM, Dec 28 at 0308, very poor S7 signal with talk, 0349 a JBA carrier, presumably a pirate (Glenn Hauser, OK, DX LISTENING DIGEST)``

Hi Glenn, For a few weeks I've had an UNID station on 6870, generally weak. But tonight it was much stronger, and there was a clear Radio Havana ID at 0106. There is a link to an audio recording of the ID:
Looking at the SDR recording, sign on was 0102. It is still on now (0130) but much weaker (Chris Smolinski, Black Cat Systems,
[www.blackcatsystems.com] UT Jan 2, WORLD OF RADIO 1807, DX LISTENING DIGEST)

13740, Jan 3 at 0448, RHC Spanish is S4, and nothing on 6870. 6870? Chris Smolinski in Maryland has been hearing it there occasionally, with definite RHC IDs, and we had been trying to figure out how RHC could land on 6870? Not an obvious SW mixing product, until Chris asked on Jan 2: ``Glenn, Is a sub-harmonic possible? I see 13740 is listed as in use at that time``

Yes! I told him, it happens, tho rarely. So that`s it. This transmitter is not completely suppressing 6870 before it`s internally doubled for the intended frequency, which is scheduled 2200-0500, 100 kW, 160 degrees from Bauta. Checking SDR recordings, he`s found the carrier on 6870 as early as 2149, opening at 2200 and signing off at 0459 (Glenn Hauser, OK, WORLD OF RADIO 1807, DX LISTENING DIGEST)

Glenn, I checked the SDR recording, and 6870 signed off at 0459, so that seems to fit. I then went back further, and noticed 6870 from 2353 until 0002. Perhaps it is fading in and out (I do notice a lot of variability in the signal strength) or whatever is producing the signal is intermittent. Going even further back, I observe it from 2149 to 2316, with just a carrier until 2200, when I hear music then a SS OM (the signal is fairly weak at this time) with a Radio Habana Cuba ID (Chris Smolinski, MD, WORLD OF RADIO 1807, DX LISTENING DIGEST)

More on the 6870 business: there were other reports of it a month ago:

Hello Again Glenn, Curious if you have any possible ID for a station on 6870 AM at 0100-0430z+ in Spanish/Portuguese??? Very good signal at ~0300z with male/female and of course music but I can't seem to find it anywhere. I have heard it before & others are hearing it tonight. I just doubt it's a pirate, sounds very professional & not a pescador station because they don't have the staying power or produce anything this good sounding. Still on at 0430z Thank you (Rafman, K4RAF, Broadband: Speed, Distance, Reliability, Cost --- Pick three, Dec 5, DX LISTENING DIGEST)

Here are his and other HFU latest logs of it:

And from Free Radio Weekly: ``unidentified -- only a carrier, 6870 AM, 3 Dec 2015, 0012-0103. Saw a carrier in the waterfall and watched it for an hour. Tried USB, ECSS, and Synchro, but there was nothing other than the carrier. It was about 30 dB above the general noise (Hunsicker, PA)``

6870 was heard by many, before on Sept 9 as in DXLD 15-37, finally IDed as Radio Habana Cuba, but did anyone axually // it to known RHC frequencies?? (Glenn Hauser, OK, DX LISTENING DIGEST)
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6870 RHC Sub-harmonic (Hauser)

cosmikdebris 767 January 07, 2016 08:22PM

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