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Country:  United States of America (USA)
Manufacturer / Brand:  Eveready (Ever Ready), AENMC / National Carbon Company (NCC); Columbia
Year: 1938 ?? Category: Power supply/conditioner or battery or charger 
Wave bands - without
Power type and voltage Is a battery or storage battery / 1.5 Volt
Power out
from Model: 740 - Eveready Ever Ready, AENMC /
Dimensions (WHD) 4.56 x 7.63 x 3.88 inch / 116 x 194 x 99 mm

Heavy duty 1.5V "A" battery with 2 prong socket used in portable and farm radios.

Net weight (2.2 lb = 1 kg) 7 lb (7 lb 0 oz) / 3.178 kg
Mentioned in Radio Troubleshooters Handbook, Alfred A Ghirardi

Model page created by Tom Seeger. See "Data change" for further contributors.

All listed radios etc. from Eveready (Ever Ready), AENMC / National Carbon Company (NCC); Columbia
Here you find 149 models, 125 with images and 20 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.