Jamming by Chinese authorities of All India Radio’s broadcast to China on SW:
Question: How many days will it take for the Chinese agencies to find out and jam a new SW frequency of All India Radio beamed to China, whose old frequency they were jamming?
Answer: If the latest case is any indication, it is 6 days.
AIR changed it SW frequencies to China on July 1, 2020 as follows:
Chinese 1145-1315 UTC 17595 kHz (replacing 17510)
Tibetan 1215-1330 UTC 9580 kHz (replacing 9450)
However full jamming continued on the old frequencies till July 5, 2020 although these changes were reported in the Dx press even before it came into effect.
The jamming would start even before AIR begins its transmission and normally ends only after AIR signs off.
The jamming consists of programs in Chinese language and/or jamming noises.
On June 6, 2020 no jamming was noticed on the old frequencies but at around 1230 UTC the jamming started on the new frequencies.
Jose Jacob, VU2JOS
National Institute of Amateur Radio
Mobile: +91 94416 96043