ECU 77

The Marconi Company Ltd.
London.
WR No 708
Made in England
ECU 77
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Central Unit
Type ECU 77B
Wt. 9.0Lbs
Inst. No. 727797
[NSN] 5831-99-112-5299
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Frame Assembly
301D8904-01
[NSN] 5831-99-112-5299
Serial No 727797
Mod Record 1

At present the function of this unit is not known. A search of the NSN calls it a Frame Assembly and it is in the categories of FSG 58 – ‘Communication, Detection, and Coherent Radiation’ Equipment’ or ‘FSC 5831 - Intercommunication and Public Address Systems, Airborne’.
This object includes its mounting tray. ECU may mean Electronic Control Unit. The booklet in D0781 has a picture of an ECU-75 for Radio and Communications called a Central Control Unit