Welcome to the forums T.A.

great topic in my opinion.

A personal insight from interviewing a "few" Luftwaffe nachtjägd crews, a real problem as they have said was so many different types of radar sets to contend with and the simple jamming done by the RAF really frustrated the Luftwaffe. New sets in late 44 into 45 were easily jammed and the only thing Luftwaffe "black men" could really do is try to re-set frequencies of the external radar aerials be changing the angle for increased performance.
So frustrating it was that notable aces just left their forward sets off (although this could be costly when RAF Mossie night fighters were in the area), that they just used the famous FuG 350ZC Naxos to home in on the RAF heavies or by concentrating on the largest amount of window (Düppel) in one area, and then they coudl find the RAF four engine bombers.
Only with the advent of the FuG 240/1 Berlin set was there any freedom, but with only 12 sets made and maybe 3 Ju 88G-6 flying with any type of success would be slim.......too late.....

~E