The models 511-M and 713-C are table and console models respectively. They may be either battery or vibrator operated, and for battery operation either a 4 volt accumulator, or a 1.5 volt dry cell "A" battery may be used, the necessary circuit modification being effected by the battery cable employed. Battery connections are shown in the accompanying diagrams. Design features include: Tropic proof construction, automatic volume control, magnetite cores in I.F. transformers and broadcast oscillator coil and air-dielectric trimming capacitors. Model 713-C employs straight line, edge-lighted dial with metropolitan stations printed in 1/8 inch high characters.