I have extreme doubts about that story - firstly those sorts of things aren't something you could conceal the failure of; they are by their very nature switched on all the time and are so powerful that any interruptions would be detected (especially the one in Kaliningrad which is entirely surrounded by NATO countries). This is one of the reasons why ELINT missions are still flown, and will always be flown, along their border and why there are satellites dedicated to capturing emmisions from them.
Plus there is what he claims is about to happen (emphasis added):
Russian media is almost entirely state controlled, and that is absolutely critical national security information. Who over there is going to break that story if it was genuine and embarrassed the Russian government? Even over here the leaker would be found and imprisoned for a very long time for making things like that known, especially at a time like this, and the media outlet that did it would come under a lot of pressure too.