RCA Model AR-920 with Antenna and Loudspeaker

On left: Radiola Loudspeaker Model 104, (1925), New York, United States, 103 x 54 x 34cm; on right: RCA Radiola 28: Model AR-920 with Antenna (1925), New York, United States, 26 x 69 x 42.5cm. Musée des ondes Emile Berliner.
Still a clearly technological object, this RCA receiver with antenna is meant for the living room, parlour, or music room. Together with its loudspeaker, it could provide entertainment at home.
Below are the Service Notes for the RCA Loudspeaker from 1925 and a diagram of the receiver.

Service Notes for Radiola Loudspeaker Model 104, USA (1925). Musée des ondes Emile Berliner.

Continuity Diagram of RCA Radiola 28: Model AR-920 with Antenna (1925), New York. Musée des ondes Emile Berliner.