Messages

211

Shortwave Broadcast / Unid 12360 kHz AM 6 Jan @ 0240z - Asian language (Chinese?)

« on: January 06, 2021, 0253 UTC »

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!

212

North American Shortwave Pirate / Worldwide Basement Radio 6855 USB 0253 UTC 2 JAN 2021

« on: January 02, 2021, 0255 UTC »

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.

213

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!

214

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   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

215

HF Mystery Signals / Re: 8 kHz wide bursts on HF - probably a common one...

« on: December 27, 2020, 0540 UTC »

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

216

HF Mystery Signals / 8 kHz wide bursts on HF - probably a common one...

« on: December 27, 2020, 0346 UTC »

...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

217

North American Shortwave Pirate / Re: 6970 AM Big Signal

« on: December 25, 2020, 0136 UTC »

01:35 Annc: "Goodnight everyone" - no ID

218

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!

219

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

220

VHF/UHF Logs, including satellites and radiosondes / Which Inmarsat am I receiving?

« on: November 29, 2020, 0306 UTC »

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!

221

North American Shortwave Pirate / Re: UNID 6935LSB 00:51z Nov 29 2020

« on: November 29, 2020, 0229 UTC »

I'm picking up a barely audible signal with music, but it's AM (sideband mode yields a carrier beat) at 0230z in central New York State - don't know if this is the same station or not.

222

HF Mystery Signals / Natural phenomenon?

« on: November 29, 2020, 0211 UTC »

I'm guessing this is a natural HF phenomenon (meteor?), but I suppose it could be a propagation check of some kind? When I used to monitor radio in the traditional fashion, I'd hear a "swoop" every once in a while - sounded like a carrier sweeping up (and I think it's always up) through the frequency I was monitoring - and once I started SDR'ing, I verified my hunch visually:

Anyone know for certain what this is? Thanks & 73 de KC2KLC

223

North American Shortwave Pirate / Re: UNID 6925 USB 0404 UTC 27 Nov 2020

« on: November 27, 2020, 0432 UTC »

Just left the air, but was booming in here in upstate NY - got a clear SSTV decode but not sure how to insert it here :/

224

HF Mystery Signals / Re: Marker? On 18.1025 MHz [EDITED]

« on: November 12, 2020, 0112 UTC »

I am located outside Binghamton, NY (south-central New York State - an hour north of Scranton, PA). I checked an online SDR further west in New York, and also one southeast of here in PA, and didn't hear it.

I just got out a portable shortwave radio - not picking anything up in the house. I a couple of miles outside town (as the crow flies), so I suppose it could be somewhat local ?

225

HF Mystery Signals / Re: Marker? On 18.1025 MHz [EDITED]

« on: November 06, 2020, 0311 UTC »

I just learned about KiwiSDR - checked some stations not far from me, and none of them are picking this up. SO - I have to suspect some type of local interference, which is a bit odd, because I'm in a semi-rural area, but there are a few other houses around...