/r/signalidentification

Photograph via snooOG

Help with identifying radio signals.

Don't know what a signal is? Post here and we will help you identify it!

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Sub-Reddits

/r/RTLSDR

/r/amateurradio

/r/shortwave

/r/signalidentification

15,704 Subscribers

10

Signal at around 220.4 and 221.3

4 Comments
2025/01/31
23:05 UTC

5

is this the tiangong signal?

it appeared when Tiangong was passing by,

https://reddit.com/link/1idjbgz/video/hio8zq45o3ge1/player

1 Comment
2025/01/30
09:30 UTC

11

Is this repetive signal morse code?

Found lots of signals that sound like it but this was very repetitive and sounded lower in tone than some of the others.

14 Comments
2025/01/29
20:06 UTC

1

Help with Signal 1 of 2

Tried to decide this using Multipsk (picture in second post) but just get jumbled letters. Could anyone help? Thanks as always.

9 Comments
2025/01/29
19:30 UTC

1

Definitely sounds like voice

Cannot clean this up in any mode but it definitely sounds like voice. Anyone suggest what to try?

13 Comments
2025/01/29
19:28 UTC

3

Just posting for interest

Received Bristol 19:25 on 29/01/25

14 Comments
2025/01/29
19:23 UTC

2

Help with Signal 2/2

Picture of decoded data from previous video.

1 Comment
2025/01/29
19:19 UTC

2

Eerie sounding signal

Hey all, got a lot more to explore with a new loop antenna. This sounds very eerie, could anyone help identify it. Is it a bundle of ft8 signals or something similar. Any help appreciated as always. Thanks

8 Comments
2025/01/28
19:45 UTC

4

OTHR?

Received a few different sounding signals this evening I think I have picked some up before but not sure about this one, is it OTHR? Possibly Kontayner?

0 Comments
2025/01/28
19:16 UTC

6

Some kind of packet radio bursts

Hey all, trying a new passive loop antenna and picking up a few new signals. This is from Bristol at 19:10 on 28/01. Is this Stanag or something else. Received packet radio before and the signal seems similar to that.

1 Comment
2025/01/28
19:12 UTC

3

is it possible to receive signal from very old satellites? like the Vanguard 1 or others?

Hello everyone, I was wondering if it's possible to receive signal from old satelites on sdr sharp, using a dipole antenna, if so, is there a website with frequencies and time?

2 Comments
2025/01/28
11:01 UTC

2

I am calling this "Unusual Side Band" as a placeholder. What is it.

Center around 467.2125 MHz. Steady carrier (if that's the right word) off-center at 467.2165 MHz makes it look vaguely like LSB. Signal lasts about two seconds. Repeats every 20 seconds. Width about 12 kHz. Listening on NFM each pulse is one high tone (maybe 300 Hz) followed by a low tone (sub 100 Hz buzz). Bee Bum. Bee Bum. Located in NYC/NJ area.

https://preview.redd.it/ya4jn2f0bpfe1.png?width=2030&format=png&auto=webp&s=63ff04800aca2020b43356b1e86df229fcfa5efe

2 Comments
2025/01/28
09:06 UTC

13

Is this RF jamming? I unfortunately live with conspiracy theorists, and they think all OTH radar is jamming, but I find it interesting that this is in a HAM band. Central USA 3:15Z 2025-1-28

13 Comments
2025/01/28
03:30 UTC

14

Is this radar of some kind? 132.8 MHz just outside of Boston, MA, US

3 Comments
2025/01/27
17:20 UTC

15

Weird signal around 8 Mhz

Could this be an OTH signal? It looks a bit different to a classic OTH signal.

12 Comments
2025/01/25
23:15 UTC

5

Unid 903.1MHz

Now normally I would know what the signals are in my area but this one stumps me. There's two of these. This one being strong at 903.1 and the other at 917.7 I think.

4 Comments
2025/01/25
21:09 UTC

10

Current 455mhz signal activity (follow up to previous post)

7 Comments
2025/01/24
02:03 UTC

16

What is to the left and right?

What signal is the pulsing on the left and the solid red on the right? Can I decode it?

5 Comments
2025/01/23
22:59 UTC

6

Unknown Signal on 466.230Mhz similar to POCSAG

I am trying to identify, and if possible decode, a signal on 466.230 and 466.075 Mhz.
The signal ist very strong an transmits every 60 seconds for a duration of 30 seconds.
Location is Germany. From my research the frequency is assigned to a pager service.
It sounds somewhat like POCSAG to me, but no decoding software is able to handle it.

https://preview.redd.it/256sp12h6tee1.jpg?width=2373&format=pjpg&auto=webp&s=fc2e9a542ab7a8d40d4c534dbab26df16eb43f50

Link to Audio:
Here

If anyone knows what it is, or could be, I would be very happy!

9 Comments
2025/01/23
21:12 UTC

5

I think these are a triac dimmer's RFI but unsure

1 Comment
2025/01/22
23:53 UTC

6

What type of paging is this?

6 Comments
2025/01/21
22:52 UTC

19

13.56 Mhz

Evening all, picking this up in Avonmouth tonight at 19:38. Is this interference or something a bit more interesting. Having a look through SigWiki as well but not sure.

11 Comments
2025/01/21
19:39 UTC

13

A better video of that 455 mhz "blip"

8 Comments
2025/01/21
00:09 UTC

25

Massive ~130khz ISM signal

4 Comments
2025/01/20
04:45 UTC

10

Anyone adept at Audio Forensics?

3 Comments
2025/01/16
23:54 UTC

26

Does anyone know what this is? Received in Chester, UK.

19 Comments
2025/01/10
19:34 UTC

16

Strange signal at HF band

10 Comments
2025/01/09
12:51 UTC

8

DDH47 (test)

2 Comments
2025/01/08
19:18 UTC

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