[radub]

I am looking for any info on the FuG VIIa radio used on the early Luftwaffe aircraft.
Most internet searches lead to a postwar Telefunken compact army radio with the same designation, but that is not what I need.
The wartime radio consisted of two separate units, a S6b sender and a E5a receiver, each featuring a large semicircle tuning dial. This is, for example, the radio set up visible in the back of the Ju87, behind the pilot.
I am looking for photos (wartime or preserved items), diagrams and technical data.
All help and leads will be greatly appreciated.
Radu