• Country
• United States of America (USA)

• Manufacturer / Brand
• Grimes, David Inc.; Staten Island, NY

• Year
• 1924/1925

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 207004

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 3

• Valves / Tubes
• UV201A UV201A UV201A

• Main principle
• TRF without regeneration; Reflex

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Wooden case

• from Radiomuseum.org
• Model: Inverse Duplex 3 Tube Model 3XP - Grimes, David Inc.; Staten

• Shape
• Tablemodel, slant panel.

• Dimensions (WHD)
• 20 x 9.5 x 15 inch / 508 x 241 x 381 mm

• Notes
• The Grimes Inverse Duplex receiver employs three tubes and a crystal detector.

• Price in first year of sale
• 85.00 USD

• Mentioned in
• Radio Broadcast adv., Jan. 1925, page 530

• Literature/Schematics (1)
• September 1924, Radio in the Home magazine advertisement on page 35

• Author
• Model page created by Hans-Joachim Korn † 16.11.15. See "Data change" for further contributors.

• Other Models

• Here you find 17 models, 14 with images and 8 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Grimes, David Inc.; Staten Island, NY