• Country
• United States of America (USA)

• Manufacturer / Brand
• Grebe, A.H. & Co.; Richmond Hill (NY)

• Year
• 1920

• Category
• Power supply/conditioner or battery or charger 

• Radiomuseum.org ID
• 247037

• • Brand: Synchrophase

• Wave bands
• - without

• Power type and voltage
• Is a battery or storage battery / 22 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Various materials

• from Radiomuseum.org
• Model: ROAB Vacuum Tube Storage Battery - Grebe, A.H. & Co.; Richmond

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 6.5 x 3.5 x 3.5 inch / 165 x 89 x 89 mm

• Notes
• Vacuum Tube Storage Battery Type ROAB with Non-Spillable jelly-like Electrolyte - B Battery for plate operation.

• Net weight (2.2 lb = 1 kg)
• 5 lb (5 lb 0 oz) / 2.270 kg

• Price in first year of sale
• 21.00 USD

• Literature/Schematics (2)
• February, 1920 A. H. Grebe & Co. Bulletin A-410, A-411

• Author
• Model page created by Alan Larsen. See "Data change" for further contributors.

• Other Models

• Here you find 188 models, 124 with images and 60 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Grebe, A.H. & Co.; Richmond Hill (NY)