A separate local oscillator is used with a pentode frequency changer and anode - bend detector. The i.f. transformers have separately screened adjustable, iron-cored coils with fixed tubular ceramic condensers. Coupling is by capacitance connected between appropriate tapings to enable a standard type of variable trimmer to be used. In the EK receiver the heterodyne oscillator is controlled by an on-off switch. This facilitates accurate inter-tuning of the transmitter to the receiver and ground station, and provides a means of eliminating interference from an adjacent channel.
Mechanical design is on the same lines as the transmitter units with dimensions slightly smaller.
Click-stop details are identical. Two Aerial-Matching Units are used, one for the trailing aerial and one for the fixed, mounted as near to the fair lead and deck insulator as possible. Information on this set contained in magazine articles. It is a Lorenze type blind landing approach receiver, usually part of the FuG 10 system. A word of caution on aircraft radios from one of Europe's foremost collectors, Arthur Bauer.