DISCLAIMER: I have no association with UVB-76 station, neither do I have any clue what is the content I am relaying. I can only assure, that the signal is received on 4.625MHz AM-modulated 900km NW from supposed origin and retransmitted unaltered. In no way can I guarantee this service, nor be considered responsible of any content re-transmitted. The only purpose for this relay to exist is because lot of people who do not have equipment or are located too far from station seem to be interested about listening to it. Should the UVB-76 station- or transmission content owners feel violated in any way, please contact me at uvb76.repeater@gmail.com and we will work it out.

Note, that because of shortwave radio signal propagation specifics the station can be more or less reliably received from around 4pm to 6am GMT on summertime. It is almost 24h audible during the winter, with short "skip-zone" blank-out around 6pm GMT.

The USB feed is considered as main source of audio today, as the voice messages are much better audible there than on the AM stream. However, the buzzer sound from the AM stream is somewhat more pleasant to listen at, so both feeds are kept simultaneously.

Friday, February 10, 2012

Dolphins on the air

Last time I spotted something like this while scanning on VLF frequencies, it did not occur me to record this strange and beautiful phenomena. Better luck this time!

With center frequency around 9kHz, the signal sounds like a whale or dolphin singing while demodulated as USB or LSB. No idea if its a natural phenomena or some sort of VLF/ELF transmitter tuning artifact (or a trolleybus passing by), but it is a spectacular signal nevertheless!

The audio recording is here: HDSDR_20120210_155552Z_13kHz_AF.wav (11.8MB)
Corresponding RF spectrum recording : HDSDR_20120210_155552Z_20kHz_RF.wav (47.5MB)
Another RF spectrum recording: HDSDR_20120210_155054Z_20kHz_RF.wav (42.7MB)

To browse the RF recording yourself, one will need HDSDR software.