VOA Radiogram is now Shortwave Radiogram. Please visit swradiogram.net


VOA Radiogram is a Voice of America program experimenting with digital text and images via shortwave broadcasting. It is produced and presented by Dr. Kim Andrew Elliott.

VOA Radiogram transmission schedule
(all days and times UTC):
Sat 0930-1000 5745 kHz
Sat 1600-1630 17580 kHz
Sun 0230-0300 5745 kHz
Sun 1930-2000 15670 kHz
All via the Edward R. Murrow transmitting station in North Carolina.

To decode the digital text and images transmitted on VOA Radiogram, download Fldigi, Flmsg and Flamp from w1hkj.com. See also how to decode the modes.

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  • VOA Radiogram: In Oregon, 100% copy of MFSK64 on 17860

    Hearing almost nothing here in northern Virginia, too close to the transmitter on 17860 kHz at 1600 UTC. But K6FIB in Oregon had perfect copy of the MFSK64:

    image

    And here is Fibber’s reception of the MFSK32 image. The horizontal line is where the signal quickly faded to nothing:

    image

    • 10 years ago
  • VOA Radiogram digital text survives low level audio

    Claudio in Italy kindly sent a recording of his reception on 24 March at 1930 UTC on 15740 kHz. Because we do not have the necessary HDSDR player, the playback audio level is too low to understand anything that Kim was saying. The tones, however, could be heard, just barely. And the tones could be decoded.This turned out to be a very good test of the capabilities of digital text via analog shortwave broadcast.

    Here is the audio of the Flmsg transmission in PSKR250, beginning a with a few seconds of Kim’s introduction. You might want to try to decode it yourself. It produced this web page:

    image
    • 10 years ago
  • For best MFSK images, calibrate your soundcard

    To ensure that the MFSK images from VOA Radiogram are properly aligned, i.e. not slanting (as below), it is useful to calibrate your soundcard.

    A useful guide to soundcard calibration is provided by the Pennsylvania Situation Report.

    image
    • 10 years ago
  • Olivia 8-1000 versus the country hit “Someday Whenever.”

    On its North America broadcast Sunday, 24 March, at 0000-0200, The Mighty KBC featured text modes at about 0130 and 0200, on its 7375 kHz frequency via Germany.  At 0130, Olivia 8-1000 was centered here, 24 dB under the country tune “Someday [garbled],” by Suzy Bogguss. (Audio here.) Well, close to perfect, and other listeners had 100% copy.

    image

    This coming Sunday on The Mighty KBC, at about 0133 UTC, MFSK128 (perhaps too fast for shortwave) will be centered on 1500 Hz. Just before 0200, MFSK64 with an Flmsg-forrmatted message will be centered on 1500 Hz, and an image in MFSK32 on 2700 Hz. This is during the 0000-0200 UTC (Saturday 8 to 10 pm EDT)  broadcast on 7375 via Nauen, Germany.

    image
    • 10 years ago
  • The Mighty KBC, 24 March 2013, 0130 UTC, 7375 kHz, with Olivia 8-1000 centered on 2500Hz, 24 dB under  the song “Someday Soon,” sung by Suzy Bogguss.

    • 10 years ago
  • WRMI digital text ID decoded in Australia

    The PSKR250 digital text ID of WRMI, Radio Miami International, 9955 kHz,
    was decoded on 24 March, 0900 UTC, by Peter, VK3RV, near Melbourne Australia. The copy is a bit garbled, but considering the distance and that Australia is far outside WRMI’s target zone, remarkable:

    image

    This is what the WRMI PSK63F IDs on 23 March sounded like and looked like in northern Virginia at 1330 UTC. Bands of interference at 950, 1900, and 2850 Hz caused imperfect copy on 900 and 2900 Hz. The other four audio frequencies provided 100% copy:

    image

    PCJ Radio International will conduct a digital text test on WRMI 31 March at 0227 UTC (Saturday, 30 March, 10:27 pm EDT in the Americas). Otherwise, there will be no WRMI text IDs this (Easter) weekend..

    image
    • 10 years ago
  • VOA Radiogram in YouTube videos

    Florenzo, IZ1CQN, in Italy, produced two YouTube videos of his reception and decoding of VOA Radiogram on 24 March 2013 at 1600 UTC on 17860kHz.

    PSKR125:

    www.youtube.com/watch?v=HtwCdH7THZE

    image

    MFSK32 image:

    www.youtube.com/watch?v=5yvoxhmdamg

    Tony Roch in France made this video of his reception and decoding of the PSKR125 mode:

    www.youtube.com/watch?v=Y7eDlMmo8aw

    • 10 years ago
  • In Italy, perfect PSKR125 reception on a shortwave portable

    From today’s 1600 UTC broadcast, Max Scordamaglia in Italy sent this image of his perfect PSKR125 reception – many other listeners also had their best luck with PSKR125. What is notable about Max’s reception is that it was not on an expensive communications receiver or amateur radio transceiver, but on a consumer-level Sangean ATS-909 shortwave portable. (See the version of the ATS-909 that Max and I own, and the newer ATS-909X). Of course, it helps that Max also has a 30 metre wire antenna:

    image

    • 10 years ago
    • 1 notes
  • From Arizona, great Flmsg copy, psychodelic Radiogram logo

    During the 1600 UTC airplay on 17860, Dave Burnett in Tucson, Arizona, had good copy of the Flmsg-formatted VOA News story in the PSKR250 mode:

    image

    His reception of the MFSK32 image was, well, a bit funky:

    image

    • 10 years ago
  • VOA News, html-formatted, via shortwave, as received in Italy

    The 1600 UTC airplay of VOA Radiogram was successfully received by listeners in Europe and in (mostly the western) USA

    Franco Spinelli in Italy sent this image of the Flmsg-formatted VOA news story transmitted in PSKR250. When all the text received, it popped up as a new window in his browser. Decode was perfect, except the VOA News at the top is supposed to be blue, and the subheads should be bold (his font might not have a bold version). And the line breaks are a bit off:

    image

    Franco had nice copy of the MFSK32 image at the end of the show:

    image
    • 10 years ago
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