"Sir, our radar has been jammed!" "Raspberry...there's only ONE man that would give me the raspberry...LONESTAR!"

If I wanted to jam a voice numbers station, I would mix four or five old recordings of the same station, and transmit the result on their frequency.

We had our own jammer in St Helens, some old bloke called Jack, if he heard anyone swearing on the CB, he'd key them out for an hour or two...

I live in an ex soviet country and we still have some of the soviet era jamming station buildings standing. It was a pretty 'big' think back then to make sure that the people here couldn't hear any western radio. I recently found an interesting and pretty technical blog post about how that jamming worked but sadly its all in estonian.

I wonder if anyone ever jammed by playing "we be jamming - by Bob Marley' haha

One of the greatest advantages to using “traffic analysis” is that while the information derived is limited, it’s also essentially impossible to obscure. If you’re an agent in the area effected by jamming this absolutely applies. If you’re hearing a jamming signal it’s probably time to destroy anything incriminating and make yourself scarce because you’re getting a not too subtle signal that the authorities are looking for someone.

in Spain in the seventies the US had the American Forces Radio broadcast near the American bases. Once in a while the signal was jammed by the Spanish government. It could last from 2 days to a couple of weeks, which indicated what we thought was something going on they didn’t want the population to hear. The jammer always sounded like what I would describe as “frying eggs”.

why do radio jammers always sound like they're using one of those old timey silent cartoon sound effects contraptions lmao

The topic of jamming always reminds me of how tuning through the shortwave broadcast bands in the 80's would subject my ears to the most annoying sounds I've ever heard. They really knew what they were doing back then.

When you mentioned the jamming of radio stations in Serbia, you could have said something about the jamming of Serbian state TV and radio stations during the NATO campaign in 1999 from Bulgaria and Romania, and also from NATO (American and British) planes. Once, during the bombing of the city where I live, all radio amateur communications on 2M band blocked by a powerful noise generator on airplanes because radio amateurs here exchange information about explosions.

All my life all I have dreamed of is jamming numbers stations. Imagine my disappointment when I heard that this isn’t an instructional video!

After all, who doesn't love a little Spy vs. Spy?

It's very rare to hear jamming of number stations these days, but mainly hear jamming on broadcasting or propaganda stations such as Voice Of Korea etc. Even the Taiwanese number station V13 rarely is heard being jammed, considering its target is presumed to be China. You never hear the Firedrake go after it.

7:58 I kept having scenes from The Americans pop in my head. Such a great show.

One rule about HF frequencies is Use it or some one else will move in, though not so common today. Most are just tones and noises perhaps with an ID, my favorite in the past was ATT (ITT-MaKay) in White Plains NY repeating their ID almost 24/7 before most went cable and satellite.

Why don't numbers station jammers just send out a signal that sounds EXACTLY like the numbers station being jammed, but with random data? I'd imagine the hardest noise for an agent to filter out with his mind is a numbers station that sounds just like what he's trying to copy.

Raspberry! Only one man would dare give me the raspberry... Lone Star!

Reminds me of the jamming of pirate radio by the UK government in the late 60's.

When I was a kid in Russia I loved listening to voice of America it was heavily jammed, once Soviet Union collapsed the transmission was coming through crystal clear and I immediately lost interest in listening to it lol, in the US today however they often use digital jammer to silence a well known preacher Earnie Sanders sometimes it’s so bad that the entire transmission is unlistenable

Radio Marti transmits a US perspective to Cuba and it's jammed by the Cuban government. I've sometimes picked up the jamming, from the UK, just north of London, on 6030 and 7435 kHz. I guess bubble-jamming explains it!

I can never get enough of number stations

Such a strange world this is, about as arcane as it gets.

Another one of my pet interests. Love these Jammer videos.

Illuminating and well researched as always Lewis

Always a good vid Lewis...one of my favourite subjects.

Hey, for some reason I'm not seeing any video on the KZfaq app, but I can tell your Lincolnshire Poacher example of "jamming" about a minute into the video wasn't jamming at all. It was just a collision with a broadcast station :) BTW I remember an occurrence from years ago when one of regular E03 frequencies was 11545 kHz. It so happened that 11545 kHz was also used by Voice of Korea (from North Korea) for transmissions to Middle East & Africa, in English, French & Arabic. Sometime in early 2010s they moved to 11645 kHz and they're still active on that freq in the afternoons. And was Firedrake actually every used for number station jamming? AFAIK, Taiwan's V13 is never jammed, even though one of their freqs collides with CNR1 Voice of China (15375 kHz IIRC). Anyway an interesting video on jamming overall. Cheers! 🍻

I love these videos on jammers. More please, if there's more examples :)

And then I get jammed by commercials!

The infamous bob marley jammer using the camberwell carrott antenna

Interesting, I heard similar noises while listening to a couple of guys talk on a repeater earlier. Nobody else seemed to mind.

There was an FM music station in New York City on 105.1 MHz, known as Jamin' 105 !

if I was a secret agent I wouldn't rely on my Amazon radio to receive my secret orders. Its F******G useless . Loving the channel

Thanks again and cheers from the U.S.

Fascinating.

It feels like these number stations and radio shenanigans are living in the past. What exactly stops the number station radio broadcaster from broadcasting on 20-50-100 different frequencies at the same time?

I have definitely hear some of these sounds. Particularly the one that sounds like when the blue ghosts are running from pacman. I'm going to check my notes. I think I noted down the frequency

All my training with CAPTCHAs could pay off

EE and GG Counting Stations were jammed as well.

The Russian wood pecker jammed a lot of us for years.

Depending on the frequency, time of the day, and propagation I think it might be difficult to effectively jam **locally** by **local** transmitters.

of all jammers, north korea sounds the most terrifying

Thanks for sharing…….

Have you any information on the purdown tower in Bristol ?

Another great video Lewis! The bestfrom LB1NH! 🙂

I believe nowa days with new satellite technology government agencies can easily use midget satellite receivers for this kind of secret transmission

Spent some time in Cyprus. Know this site well.

yellow house speaking of the yugo wars

The view from a drone is very close from the antenna , is that allowed in GB ?

I've often wondered why HM01 is not jammed here in the US?

Better than just jamming these stations is finding the intended audience.

Lincolnshire Poacher was jammed a lot.

I still don't understand why numbered radio stations don't jammed by broadcasting recorded broadcasts of the same station. This is much easier to do and will greatly reduce the chance that the message will be received.

I wish they do that to Radio Havana Cuba on 6000 kHz as well as all stations playing the late Brother Stair (Virus of Shortwave) which he is so annoying to listen to lol. -Cheers!

If they recorded the jamming signal close to its source, could they invert that signal to remove the jam from recordings of the two signals together?

Most are deliberately but some are unintentional depending on what frequency it used

I'm pretty sure that last one was someone playing pac man.

Did you get any snow in manchester i din here in walsall

We had jam yesterday, and we'll have jam tomorrow, but never jam today.

Thought this was going to be about Bob Marley

Often the North Koreans do to certain stations

Jammers aren’t they same anymore. Up up shovel. You’re just not (blows into microphone) strong enough !

Eventually, starlink will make almost all of this obsolete

Still have to be aware of ionospheric skip.

I think I'd feel obligated to use recordings of jam bands, interspersed with advertisements for jam.

I do this

Please tell me someone used Bob Marley to jam radio

Hi shot the sheriff but i did'nt shoot the deputy.seriously though nice one lewis

It'd be hilarious if China pulled a copyright strike for playing Firedrake 😂😂

Why are numbers stations still used? I'd have thought that there are plenty of ways to covertly send information through the internet, for instance embedding codes into a JPEG image. Couldn't information be sent out without anyone even being aware that it contains covert messages? Obviously I'm missing something because these stations are still used.

Wow, really, and you told me they (number stations) don't exist anymore... ;)

"not an instructional video" 😁 I'm wondering how a jammer that monitors for a transmission doesn't get stuck in a loop.

Bob Marley used to do it in the name of the Lord.

Jamming number stations is very unfair to the expats that play bingo.

This is a bit off topic. But does anyone remember a CW station in the 14 MHz band in the late 1970s and early 80s that used to transmit political propaganda related to South East Asia?

Firdt

Jamming of number stations is higly ineffective. Number station are virtually point to point transmissions. You have to know exactly where receipient is located and then choose the location of the jammer. Frequency, time of the day, time of the year and current sunspot activity have to be taken into account. Fruitless job, especially that transmissions are taking place at various times of the day and various frequencies. It's not like jamming Radio Free Asia with fixed schedule and fixed target.