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Characteristics of 14 m M M wave telescope of "RA0 with a multibeam focal ptane array (FFA) are considered. Simulation shows that 7x7 element tightly packed FPA at 85-1 15 GHz is a highly effective instrument for 14 m telescope. Expected beam spacing is 1.5-2*HPBW. the field of view is up to IZ'x12'. Estimated FFA sensitivity with he suggested receiver scheme is 5-10 ~W S '~ per beam per channel. 14 m TRAO telescope with 7x7 FPA and 1-20 GHz filterbank backends may be used for mapping in continuum and some spectral astrophysical tasks.