Decoding VOA Radiogram Program 107

Image decoded from VOA Radiogram

I didn’t have much success decoding VOA Radiogram program 106 last weekend, probably due to changing shortwave propagation conditions as we head closer to summer. According to Kim Andrew Elliott, propagation for last week’s 17860 kHz broadcast was probably the worst since the start of VOA Radiogram in 2013.

I had better luck decoding this weekend’s VOA Radiogram program 107. There were three images and three news items broadcast during this show:

* India’s net neutrality debate
* US Congressional hearing on Russian international media
* VOA Russian story about Yuri Gagarin

Decoding VOA Radiogram Program 106

Image decoded from VOA Radiogram

This week, VOA Radiogram returned to entirely MFSK32 news items. There were five images and five news items this week:

  • Anti-venom against sub-Saharan snakes
  • New aluminum-ion battery
  • Chinese TV broadcaster punished for comment
  • Balloons send “The Interview” DVDs into North Korea
  • Islamic State hacks TV5Monde TV

Decoding VOA Radiogram Program 105

Image decoded from VOA Radiogram

After last week’s experiments with 8PSK modes, this week’s VOA Radiogram returned to mostly MFSK32 encoding. VOA Radiogram program 105 contained four images and five news items this week:

  • Russia Denies License to Tatar-Language TV
  • Tatar-language TV channels off air (broadcast twice)
  • Cyberattack targets GitHub
  • Google and Chinese website certificates
  • Cuba will increase Internet access

Decoding VOA Radiogram Program 104

Image decoded from VOA Radiogram

VOA Radiogram program 104 this week was an experiment in reception of different digital modes. The same news story, “Battle for African Internet Users Stirs Freedom Fears,” was broadcast five times in succession using increasingly faster modes. The modes used were:

  • MFSK32 (with image)
  • MFSK64 (with image)
  • 8PSK125F
  • MFSK128 (with image)
  • 8PSK250F

There was also a MFSK32 image at the end of the broadcast.

MFSK32 is used regularly on VOA Radiogram and MFSK64 and MFSK128 are faster modes that have been used less often. But the 8PSK125F and 8PSK250F modes were new to VOA Radiogram. 8PSK250F is over five times as fast as MFSK32.