F-5-M

• Country
• United States of America (USA)

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

• Year
• 1925/1926

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 37094

• • alternative name: Lee De Forest Mfg.

• Picture
• Schematics

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

• Number of Tubes
• 5

• Valves / Tubes
• DV2 DV2 DV2 DV5 DV5

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown); 2 AF stage(s)

• Tuned circuits
• 3 AM circuit(s)

• Wave bands
• Broadcast only (MW).

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

• Loudspeaker
• Horn

• Material
• Wooden case

• from Radiomuseum.org
• Model: F-5-M - DeForest Radio Telephone &

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

• Dimensions (WHD)
• 22.75 x 16.75 x 16.25 inch / 578 x 425 x 413 mm

• Notes

• The DeForest F-5-M is a battery operated BC band receiver.  Has three dial primary tuning controls. Uses 6V "A" battery, 90V "B" battery with taps in 22.5V increments and a 4.5V "C" battery.  The detector stage operates from the first 22.5V tap on the "B" battery.

  Equipped with built-in Horn Loudspeaker and battery compartment. Same chassis is used in all of the F-5 models.

  M is for Mahogany wooden case.

  DeForest Tubes
  Five required for any F-5

  Type DV-2 Storage Battery Type Audion  $3.00
  Type DV-5 Storage Battery Type Audion  $3.00

  Note: When storage "A" Battery is used for filament current supply in the F-5, 5 DV-2's or 5 DV-5 tubes are required, or preferrably, 2 DV-5 and 3 DV-2 tubes.

  Type DV-3 Dry Battery Type Audion  $3.00

  Note: When Dry batteries are used for filament current supply in the "F-5," 5 DV-3 Tubes are required. 

• Price in first year of sale
• 110.00 $

• External source of data
• Ernst Erb

• Source of data
• Radio Collector`s Guide 1921-1932

• Mentioned in
• Collector's Guide to Antique Radios 4. Edition (January 1926, Electrical Record Supplement page 31)

• Literature/Schematics (2)
• Radio Broadcast, Dec. 1925, p. 225

• 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