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Messages - alleycat

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196
Sorry for any confusion - I probably posted as I was listening, so the GMT timestamp may be correct; *possibly* I calculated it incorrectly from my local time zone (Eastern Standard), but as someone who's been an active utility monitor and ham operator since the late 1970's, I find it hard to believe I goofed this badly.

I notice the notation "Last Edit: January 25, 2021, 0817 UTC by Skipmuck" at the bottom of my post. Is there some way to know what the nature of that edit was?

197
Very weak signal - I can only make out that music is playing. Possibly Radio Difusora Roraima in Brazil, but I think a pirate is more likely given my location (upstate New York, U.S.A.). Tried a few other radios in the region using SDR Console's network feature, but can't find a stronger signal elsewhere.

198
Thanks Token for coming to my rescue last time - here's another one that doesn't bear any resemblance to anything on SigIDWiki: Every few minutes on 6961 kHz last night I observed two identical bursts in short succession of what appears to be a very brief 24 (?) tone signal. Audio at http://www.lutins.org/temp/6961.mp3 and waterfall at http://www.lutins.org/temp/6961.jpg. Thanks again in advance for your expertise!

199
HF Mystery Signals / LINK- not 11?
« on: January 24, 2021, 0134 UTC »
Are there other LINK- signals besides LINK-11? I hear a 2.8 kHz-wide signal booming in perennially on 6942 kHz (upstate NY, U.S.) that sounds like LINK-11, but the pulses are very regular. The example on SigIDWiki has long bursts between regular short pulses, while the recording on FirstToken's YouTube channel at https://www.youtube.com/watch?v=__-rtLRQUhg is characterized by a 'lilting' pulse. An audio example of what I'm hearing is posted to https://www.lutins.org/temp/6944_kHz.mp3, with a waterfall capture at https://www.lutins.org/temp/6944_kHz.jpg. Thanks for enlightening me!

200
Doesn't CNR1 usually use Firedrake for this purpose? The transmission I heard was clearly a talk show with multiple announcers. Perhaps this is typical - I just haven't come across a reference to this being done.

201
Asian language talk show booming into upstate NY - nothing turns up in a search of this frequency, and this appears to be outside the standard broadcast bands. I'm using SDR Console, and judging by reception via networked radios, reception is strongest in northeastern North America. Can someone ID this? Thanks!

202
Decent signal with moderate fading in central New York State. "Growling voice" ID was unintelligible to me. Playing rock music (I don't recognize any of the tunes so far

Confirmed - ID @ 0258z. Steely Dan @ 0300z.

203
HF Mystery Signals / Re: 6505 kHz digital signal - mixed modes
« on: December 31, 2020, 1448 UTC »
Wow, wasn't expecting an S10 signal from South Africa - I guess their military is projecting serious world-wide coverage. Thanks for confirming that and a blessed and healthy new year to you!

204
HF Mystery Signals / 6505 kHz digital signal - mixed modes
« on: December 31, 2020, 0355 UTC »
I can never seem to find a good match at SigIDWiki for the stuff I hear :P  Closest match appears to be "Saab Grintek MHF-50 MFSK Modem" but that's a South African mode and I don't think that's what I'm receiving loud & clear in NE North America. Going for a while not at 0350z on 6505 kHz - approximately 2.5 kHz-wide digital signal that cycles between several different modes; one sounds like RTTY, another has multiple tones. Audio sample at https://www.lutins.org/temp/6505.mp3 and waterfall at https://www.lutins.org/temp/6505.JPG. Any help appreciated!  73 de KC2KLC

205
Excellent reply - thanks! Curious that, given how frequently I see these on the waterfall, I don't see good correlates at sig ID Wiki (Relocatable Over-the-Horizon Radar is close, but far from identical). I would have thought a radar system would be more continuous - surprised to learn that it is used in short bursts and that the frequency jumps around. Then again, I cut my monitoring teeth in the 1970's when the Russian Woodpecker (which I believe was an OTHR system) was continuously gobbling up megahertz of bandwidth :(

206
...but I can't find anything that looks remotely close in the READ ME for this group nor at www.sigidwiki.com. Hear these all the time all over the HF band - waterfall at https://www.lutins.org/temp/waterfall.jpg  &  audio sample at https://www.lutins.org/temp/audio.mp3

207
North American Shortwave Pirate / Re: 6970 AM Big Signal
« on: December 25, 2020, 0136 UTC »
01:35 Annc: "Goodnight everyone" - no ID

208
HF Mystery Signals / Re: Natural phenomenon?
« on: December 05, 2020, 2336 UTC »
Over 4 decades of monitoring the airwaves, and I'm still learning something new about them on a regular basis. Thanks!

209
Utility / GMDSS Station ID #s?
« on: November 29, 2020, 2332 UTC »
Are the station IDs for the GMDSS DSC stations on HF (2187.5, 4207.5, 6312.0, etc.) the same as the IDs used on longwave DGPS stations? I've been monitoring digital signals for decades, but recently discovered I'd missed the easy-to-log HF GMDSS signals - so I fired up DSCDecoder, and I'm seeing short "health" messages with Station IDs, but one of the IDs seem to be from an Asian station, which is unlikely given propagation at the time. Any advice regarding this mode is appreciated! 73 de KC2KLC

210
I just obtained a SDR-Kits patch antenna, and am decoding (using JAERO) a number of Inmarsat signals from 1545.015 through 1545.205 MHz. I see a lot of info online about these birtds, but none of the positions makes sense. I'm at roughly 75 degrees west, 42 degrees north, and the signals are strongest when I'm pointing south. (I'm on the west side of my house, so I have a clear shot south- west-north but anything at all east would presumably be blocked by the house.) Can anyone tell me for certain which Inmarsat I'm hearing? Thanks and 73 de KC2KLC!

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