Messages

1

HF Mystery Signals / Re: 13100 +/- Khz mystery signal

« on: March 31, 2024, 2139 UTC »

Recording?  Screenshot?

What you are describing is pretty open to interpretation.  Since you posted I have left a receiver on the frequency, so far have not heard the signal.

T!

2

Utility / Re: USAF HFGCS message at 20 MHz?

« on: March 30, 2024, 0319 UTC »

Nice find, wish I had recorded it.

Sounds faked / pirate / hoax to me.  In addition to all the reasons ~SIGINT~ points out, it just sounds wrong and forced.  And the voice is synthetic, something you don't find on HFGCS.

And that leads me to why I wish I had recorded it.  I have lots of faked / hoax signals in my recordings, but never faked HFGCS traffic.

T!

3

HF Mystery Signals / Re: What kind of OTH radar could this be..

« on: March 29, 2024, 1849 UTC »

This is not an OTHR.

I don't know what it is, specifically, but for a variety of reasons (features of or missing from the signal) I know it is almost certainly not a radar.  Or if it is (since almost any signal can be) a radar it is an extraordinarily poorly designed one.  I suspect it is data of some kind, but to get a better handle on what it is would require a different recording, preferably an IQ recording or an audio recording in FM or SSB (I prefer USB) that captures both "carriers" and everything between them.

T!

4

HF Mystery Signals / MOVED: 6.220 Mhz CW Please help with I.D

« on: February 29, 2024, 0801 UTC »

This topic has been moved to Utility.

https://www.hfunderground.com/board/index.php?topic=126251.0

5

HF Mystery Signals / Re: 7182-7196 kHz -- digital or radar?

« on: February 29, 2024, 0801 UTC »

Not sure what this is -- it sounds different, and looks more fine-grained, than radars I've heard before, but I'm no expert.

Also, on 7200 LSB, there's a continuous beep-beep in the background.  I know this frequency is heavily QRMed, but this sounds very similar to ALE to me.

Without recordings, date and time in UTC, or a bit more description, there is no way to know what you are describing.

As for the radar, a bit before you posted this the Russian 29B6 radar was on that frequency.  However I don't know how long before you posted this you heard what you heard and it was not on that freq at the time this was posted.

T!

6

European Pirates and Private Stations / Re: Cupid Radio test 21800 AM 1600 UTC 11 FEB 2024

« on: February 11, 2024, 1656 UTC »

Cupid is about S7 into the Mojave Desert of California today.

Long time no hear.

T!

7

North American Shortwave Pirate / Re: Wolverine Radio 6950 USB 0056 UTC 24 DEC 2023

« on: December 24, 2023, 0103 UTC »

Heard the Testing announcement, and flipped the source over to the house sound system.  Not super strong into the Mojave Desert tonight, S 7 or so, but perfectly usable.

T!

8

HF Mystery Signals / MOVED: UNID (Volmet?) 17326 USB 2014 UTC 11 OCT 2023

« on: October 21, 2023, 2246 UTC »

This topic has been moved to Utility.

https://www.hfunderground.com/board/index.php?topic=119609.0

9

HF Mystery Signals / MOVED: UNID 15016 USB 2143 UTC 5 Oct 2023

« on: October 06, 2023, 0250 UTC »

This topic has been moved to Utility.

https://www.hfunderground.com/board/index.php?topic=119007.0

10

HF Mystery Signals / MOVED: UNID voice 8868 USB 0306 UTC 19 Aug 2023

« on: September 21, 2023, 1426 UTC »

This topic has been moved to Other.

https://www.hfunderground.com/board/index.php?topic=117197.0

11

HF Mystery Signals / MOVED: UNID 4868.5 USB 1948 UTC 26 Aug 2023

« on: September 21, 2023, 1426 UTC »

This topic has been moved to Other.

https://www.hfunderground.com/board/index.php?topic=117449.0

12

HF Mystery Signals / MOVED: "exercise" stn, 8058.5 USB 2354 UTC 29 Aug 2023

« on: September 21, 2023, 1426 UTC »

This topic has been moved to Other.

https://www.hfunderground.com/board/index.php?topic=117562.0

13

HF Mystery Signals / MOVED: 6660 LSB 17 SEPT 2023

« on: September 21, 2023, 1425 UTC »

This topic has been moved to Other.

https://www.hfunderground.com/board/index.php?topic=118290.0

14

Equipment / Re: Made in China Wellbrook 1530 Loop Antenna?

« on: July 06, 2023, 1834 UTC »

Anyone notice the OIP2 and OIP3 numbers on that site?  I may just be a bit of a skeptic, but I don't think that thing is doing anything but sparking at the stated "90 dBm" (1 million Watts).

T!

15

Utility / Re: Civilian aircraft on 11175 kHz USB, twice

« on: April 17, 2023, 1213 UTC »

United 1948 called mainsail on 11175 on the evening of the 16th as well.

Got a time for that?

T!