• Country
• United States of America (USA)

• Manufacturer / Brand
• Mallory, P.R. & Co.; Indianapolis, IN

• Year
• 1932 ?

• Category
• Power supply/conditioner or battery or charger 

• Radiomuseum.org ID
• 46752

• Power type and voltage
• Storage Battery for all (e.g. for car radios and amateur radios) / 6 Volt

• Material
• Metal case

• from Radiomuseum.org
• Model: Elkon Auto B - Mallory, P.R. & Co.;

• Shape
• Chassis only or for «building in»

• Notes
• +B Power Supply for Auto Radios and Farm Radios

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 4 = ca. 1934 and before

• Other Models

• Here you find 36 models, 29 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Mallory, P.R. & Co.; Indianapolis, IN