Ju 87 Stuka Equipment Question

[Georgien Bulldogge]

Behind the cockpit on the Stuka (and the He 219) on the dorsal fuselage there is a circular area that has an insert that, for lack of a better description, looks like a fan. Can anyone tell me what that is and its use? Thanks!

 

[meatloaf109]

It's called the Peil G6 radio direction finder.

 

[Crimea_River]

Yep. Here's a pic

 

[Wurger]