Jammer, North Korean, jamming The Voice of The People, July 24, 2011, 1545 UTC, 4450 and 8900 kHz

This is a Jammer (4450 kHz) and second harmonic (8900 kHz) , probably from North Korea, covering the Korean language broadcast of the Voice of the People, July 24, 2011, at 1545 UTC. VOTP is on 4450 kHz and the jammer fundamental is also on 4450 kHz. But the second harmonic of the jammer on 8900 kHz is clearly heard also.
Recorded and received usinf a remote Perseus receiver located in Japan. The signal was usable at my location in the Mojave Desert of California, but the 2nd harmonic was very low level. So I selected a Japanese remote to get a good copy on the harmonic.

[@Sypaka]

I never heard a jammer like that. The sound on 8900 sounds incredible, (to me) though. i wonder how the jammer is made to sound like that.

[@Josh-le6lu]

Deth metal ambulance siren.

[@rEdf196]

I just picked this up this morning 1/20/12 at 4450 khz being jammed by a continuous humming airplane sound that went on all night and into the morning.

[@Xkeeper0]

Damn, that's one hell of a jammer.

[@FirstToken]

@mosesofmason3 Every online source I can find (including the Aoki list, EiBi List, NASWA list) indicates that on the day and time this recording was made (and still to this day) 4450 kHz was used by the Voice of the People, transmitting from there facility Kyonggi-do, South Korea. Just this morning I heard Voice of the People on this frequency, with their ID and announcement. Naturally, multiple stations sometimes use different frequencies, but this is a video of North Korean jamming, not South

[@FirstToken]

@Staplesz This particular radio is a Microtelecom Perseus SDR. My videos are mostly made using one of four SDRs, this Perseus (or connected remote Perseus units), The RFSpace SDR-IQ, RFSpace SDR-14, or the WinRadio Excalibur G31DDC SDR.

[@MosesYouTubePage]

4450 kHz is Voice of National Salvation operated by National Democratic Front of South Korea (NDFSK), a notional guerilla group run by North Korean. So the jamming is from South Korea...

[@MosesYouTubePage]

@FirstToken Ya, I confirm I made a mistake. That's ``Voice of the People''. Thank your for sharing with us!

[@FoxyLobo]

This is very interesting, what kind of radio do you have? thanks for sharing this

[@Note.Swiper]

Oh that i hear recently!

[@FirstToken]

@mosesofmason3 If your source of this information is ClandestineRadio (dot) com you might look at the age of their information. NDFSK out of PyongYang used the 4450 frequency about 7 years ago, but today it is Voice of the People on that freq.

[@strnglhld]

FirstToken Question.. is the voice you hear talking from Voice of the People that broke through the jammer, or is the voice from North Korea?

[@lacek_dx]

i'll try it to catch in Hungary :D

[@Yessir1506]

You can actually hear this in Russia unbelievable

[@tylersalisbury872]

what are the frequency of the tones used to jam?

[@FirstToken]

They appear to be varying audio tones, also multiple tones plus their harmonics.

[@tylersalisbury872]

FirstToken I used a software to average the tones and they use 660-1015hz with a bad transmitter changing frequencies the lower the tone the higher the carrier frequency is.

[@FirstToken]

+Tyler Salisbury said "FirstToken I used a software to average the tones and they use 660-1015hz with a bad transmitter changing frequencies the lower the tone the higher the carrier frequency is." How did you determine the transmitter is "bad" and changing frequency? Did you use this recording?

[@tylersalisbury872]

i found a sdr in china that is on sdr.hu and N. Korea signals come in very strong....

[@turgisourwayoflife9619]

@@FirstToken how do I listen to it on my phone that would be epic please tell me

[@OP4Kub]

Can someone explain what this is?

[@FirstToken]

This is North Korea jamming a broadcast of Voice of the People on shortwave. North Korea, like China and Vietnam, run many jammers trying to keep the people inside their countries from hearing selected radio transmissions from outside the country.

[@hypixelbedwarproray3399]

the siren raido

[@havanadaurcy1321]

Elephant 🐘

[@hahman1st]

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