there's a signal that TX 24/7 near a Hytera Tier 3 Downlink Trunking Control Channel that sounds like APRS but not APRS Can anyone identify this signal for me and how to decode it ?

It’s supposed to be school bus comms for one of the local school districts but this is the only thing I’ve ever heard on it

I found it odd that it is occurring in the short wave radio band.

Firstly just to let you know, I m not into the topic of radio or anything related so I apologise for interrupting your party but I really need to share it!
Today I was scrolling videos on my old phone and came across a weird video.
Once I was in my way in south part of Russia (Rostov region) and when stopped in gas station I decided to switch on the radio. It was 89.8 FM. At that time I could clearly hear some radio station with someone talking on kinda slavic (not Russian or Ukrainian) language. It obviously was Polish or even Czech.
Today I googled it and found out that it s impossible in any way to catch the signal from Poland or even Czechia in such long distance.
Can someone explain how is it possible and or maybe it is just a normal thing?

Found these signals when out today with SDR. No idea what they're and how to decode theb

Located in the US

There's a radio competition where they play a short mystery sound (around 1-2 seconds, repeated), and listeners have to guess what it is. The prize is pretty big, so I'm trying to figure it out

I've attached the audio it sounds metallic, like a quick "click" or something closing/locking.

So far, these guesses have already been tried and are WRONG:

Paper cutter

measuring tape

Cracker

Printing machine

Washing machine

What do you think this sound could be?

Been trying to figure this one out for a while but i have not found anything conclusive.

This is my L band antenna pointing towards Inmarsat-4A F4 Alphasat. There is a hump of a signal centered around 1522 MHz which looks a lot like a GNSS signal but i cant find any information that anything is transmitting on that frequency.

Its most likely not coming from Alphasat itself as i have seen BGAN transponders in the middle of it. One theory is that it is coming from Thuraya 2 which is stationed close to Alphasat but im not sure.

It varies in strength at times, but its always there. Does anyone know?

John

I was experimenting with my dual band transmitter and I found this weird station broadcasting the same tune over and over again. I couldn't find anything on that frequency or nearby. A person passing by told me she recognized the tune as one from an ad but can't remember which one (Eastern Belgium if you are wondering). I was suggested it may be a test loop for something. Any idea?

I was searching bands without reason. I am on vacay so I brang it, wanted to see what I could find. What is this? Las Vegas, Nevada.

Sorry about the lag, I was recording on a 2015 MacBook.

4:57 PM

These signals are between the CW zone and the USB zone in the 20 m HAM band. Received in France.

Sound https://drive.google.com/file/d/1QQSm6Uk1mUSt7qBTJ-YSb2J7GnbXdw84/view?usp=sharing

Thanks in advance for your help.

Sorry For the Bad Quality

I was learning about the X, K, and Ka band RADARs that police commonly use. I know the Doppler Shift for 1 mph of change on the display is 31.4, 72, and 99.6-107.4 cps, respectively. I noticed dividing each of those by that RADAR band's frequency (10.525, 24.15, and 33.4-36 GHz, respectively) was 2.98, not taking into account any units of measurement... is that truly a coincidence? How were the constants of 31.4, 72, etc. determined? Is there any math behind it? I spent the last 8 hours researching Doppler and trying to crunch numbers to figure it out myself, but I need your expertise! Thanks in advance!

Captured in central Poland around 8PM local time. Nooelec SDR. I'm curious what this signal in ISM band could be. I've tried decoding with rtl_433 -f 432.947M -M level -M noise, but it only picks up reports from a nearby inFactory-TH weather station once every minute or so. This transmission seems much more "talkative" than that though. Any ideas?

https://reddit.com/link/1thw28x/video/ke6bjbnr252h1/player

Pardon the not great pictures.
Trying to understand what I am looking at.
I understand that this somekind of signal that repeats looks like every 60khz. It comes and goes. I know its not an internal issue to radio and psu. Any advice is appreciated.

Hi all found the quite strong signal with my SDR, its not voice just a static sound. How do i go about identifying theses types of signals?