[Tango Echo Dog]

Gentlemen
I have followed the correspondence with some interest and the first question I have to ask is when was X-Geraet used against Moscow?
Given the intermittent nature of Luftwaffe attacks upon the city and the fact it usually involved small forces, it does seem surprising that the Germans would go to this trouble. But I could well be wrong.
I am not aware of any PVO published history mentioning jamming of radars, in fact my impression is the Russians preferred to jam communications.
The one exception, mentioned by Kirill, was the use of 'Window' It appears to have been developed without any Anglo-American input during 1943 but what is not clear is exactly when it was first deployed.
Perhaps Kirill can provide this information