• Country
• United States of America (USA)

• Manufacturer / Brand
• Gulbransen Co.; Chicago

• Year
• 1932 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 43757

• Number of Tubes
• 6

• Valves / Tubes
• 24 24 24 24 45 80

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

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC)

• Loudspeaker
• Permanent or electro-dynamic (moving coil), system not known yet.

• Material
• Wooden case

• from Radiomuseum.org
• Model: 330 - Gulbransen Co.; Chicago

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Notes
• Tube type 57 in AF amplifier

• Price in first year of sale
• 48.00 $

• External source of data
• Ernst Erb

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

• Mentioned in
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Literature/Schematics (1)
• Machine Age to Jet Age II (page 155.)

• Literature/Schematics (2)
• Cathedral & Tombstone Radios (page 132.)

• Other Models

• Here you find 64 models, 10 with images and 31 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Gulbransen Co.; Chicago