What is that strange noise on the HF bands?! Radio Oddities explains all!!

Ever wondered what that annoying intrusive signal is that often works it’s way up and down the HF bands?
Radio Oddities explains what it is your hearing!

[@k2cjbradio]

Welcome back! I heard that same signal stateside. Thanks for posting this! 73 de K2CJB

[@myg0t_jsm]

I've never been sure about this but what type of OTH radar is that?

[@Jack_Perkins]

Rather intense sound. Very interesting find👍🏻

[@Ploggy.]

Thanks for the info good vid 👍

[@RogueError617]

Oh wow so I guess that’s what that numbers station called the backwards music station is also

[@sbreheny]

Are you sure this isn't a digital broadcasting mode like DRM? I think that OTH radar usually is less continuous (more impulse-like).

[@sbreheny]

Or possibly STANAG 4285 or similar military encrypted comms?

[@myg0t_jsm]

No this is definitely RADAR. There's been a lot more between the ranges of 4.2 MHz to 7.1 MHz, a common range where Russian mil comms are also located

[@FirstToken]

@@myg0t_jsm No, not radar. Looking at the audio spectrum, it is not pulsed, pulsed BPSK, FMOP, or FMCW, the most common types of radar transmissions. This sounds much more like a data transmission of some kind.

[@raycarpenter8459]

welcome back chap 2e0erl

[@Martinpacker]

Nice beard.

[@RadioOddities]

Thanks 😁😁