Recently been reading Max Hastings´ Bomber command
so not my ideas presented here...
He had some ideas on radar etc development
( Freely by what what I remember ) :
"By 1940 Germans were far ahead with the radio beam system. Not until 1943 did the British catch up but afterwards they were clearly ahead of the Germans during the rest of the war. The US forces were totally depending on the British systems."
" The Gee was captured soon by the Germans and started jamming effectively along the entire front after eight month´s of its capture"
The increasing use of GEE inevitably led to a GEE set falling into German hands. It was not surprising to the British but within five months of its operational début the Germans started to jam transmissions. This first took place during a raid on Essen on 4/5th August 1942. Due to severe icing conditions only 18 out of 38 aircraft were able to drop bombs in the Essen area. Four days later on the 9/10th August during a raid on Osnabrück, the jamming became more effective although the bombing was still held to be a success.
http://www.nucleus.com/~ltwright/HISTORY%20OF%20GEE.htm
For Oboe the problems were:
"The main problem with Oboe was that the curvature of the earth restricted the range of all landbased signals and so the system could not be used against certain parts of Nazi Germany such as Berlin and Hamburg."
So it´s range was about the Ruhr area.
As well the British had only two control stations that could keep up with 12 bombers over the target at a time...
http://www.spartacus.schoolnet.co.uk/2WWoboe.htm