Are any KiwiSDR receivers in Europe particularly useful for picking up these transmissions?
Hi All!!! Yes, you can hear them well in the neighboring countries of Ukraine, such as Poland, the Czech Republic, Austria, Switzerland, Hungary and Romania. But also further, like Germany, the Netherlands and Sweden, Finland. They broadcast during the hours of good daily propagation for Europe, that is around 10-15 UTC. As the operator said, the broadcasting depends on the propagation conditions - they are experienced. Their area of interest is Russia and the territories of occupied Ukraine, so they speak Russian, but they know that the rest of the free world is listening to them.
The night channel 3931 LSB has not been used recently, perhaps because Belarusian HAM's treat him as "national" and have asked for his release.