Shortwave Oddity, N&O ID VC01, the "Chinese Robot", 7705 kHz, USB mode, 23 April, 2024, 1236 UTC

This is a Chinese oddity station, found on shortwave, known as VC01, also called the "Chinese Robot". The designation VC01 was assigned by the Numbers and Oddities web site. This signal has been active for over 20 years. Its purpose has never been confirmed, but it may be related to Chinese military air tracking. There is a, probably, related Morse code station that carries similar traffic. The Morse station is known as MC03.
The station is often on the air 24 hours a day, every day. It uses at least 4 frequencies in a 24 hour period, a set of 2 frequencies for possible daytime use, and another set of two for possible night time use. Typically one frequency of the set of two is in USB, and the other is in LSB. It typically operates on a given set of frequencies for about a month, and then changes them all.
The voice is obviously either recorded human, machine selected and reproduced, or it is synthetic. The rate of delivery is too fast for reliable human copy over extended time. This leads some to believe that both transmission and reception are done by machine, which naturally leads to the question of, if it is machines at both end of the circuit, why do it in human speech?
Received at my location in the Mojave Desert, California, USA, 23 April, 2024, at 1236 UTC.
Disclaimer: Many of the radio reception recordings on this KZbin channel pertain to unusual, uncommon, unknown, or mystery signals that might be found on radio, both shortwave and VHF/UHF. Among the subjects covered are numbers stations, utility stations, military transmissions (both in the clear and encrypted / encoded), aviation, maritime, ham radio, CB radio, radars, ionosodes, propagation beacons, ditters, dashers, whistlers, and just about anything else that might transmit, in any mode, USB, LSB, CW, Morse Code, FM, AM,FMCW, LFMCW, etc. Think of it as SIGINT (signals intelligence) / COMINT (communications intelligence) / ELINT (electronic intelligence) lite, the hobby version. All the recordings are made by me, most often at my home. Although there are a few mysterious things to be found here, you will not find anything paranormal, extraterrestrial, spiritual, or mystic. However, everyone can have their own interpretations of the sounds heard, make of it what you will.

[@griffinbai5701]

6941 Khz recently .

[@hoteltango1409]

Any chance of the frequency hopping? Based on my military experience, I remember hearing a similar sound when I entered the wrong CEOI

[@FirstToken]

The frequency does not hop, but it does change. Twice a day, probably local day and night sets of freqs, and then about once each month it completely changes to a new set of frequencies.

[@havanadaurcy1321]

Robot vs beep

[@afnDavid]

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