• Country
• United States of America (USA)

• Manufacturer / Brand
• DeForest Radio Telephone & Telegraph Co. (De Forest); New York

• Year
• 1921

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 195831

• • alternative name: Lee De Forest Mfg.

• Number of Tubes
• 1

• Valves / Tubes
• UV200

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown)

• 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: Combination Set No. MR-1 - DeForest Radio Telephone &

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Notes
• The DeForest Combination Set No. MR-1 consisted of the following panels, a MP-100 Audion Control, and a MT-100 Tuner in a oak cabinet. The MT-100 tuner had a wavelength range of 180-400meters.

• Net weight (2.2 lb = 1 kg)
• 20 lb (20 lb 0 oz) / 9.080 kg

• Price in first year of sale
• 66.00 $

• Literature/Schematics (1)
• DeForest "Interpanel" Sets Catalogue "E"

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

• Other Models

• Here you find 158 models, 132 with images and 16 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from DeForest Radio Telephone & Telegraph Co. (De Forest); New York