• Country
• United States of America (USA)

• Manufacturer / Brand
• High Frequency Laboratories (HFL); Chicago, IL

• Year
• 1929

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 44355

• Number of Tubes
• 11

• Valves / Tubes
• 324 324 324 324 324 327 327 327 345 345 380

• Main principle
• Superheterodyne (common); 2 AF stage(s); Screengrid 1926-1935

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast only (MW).

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

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Mastertone [old] - High Frequency Laboratories

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 7 x 21 x 7.5 inch / 178 x 533 x 191 mm

• Notes
• Push pull output. One dial (primary tuning control knob)

• Price in first year of sale
• 180.00 $

• External source of data
• Ernst Erb

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

• Circuit diagram reference
• Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

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

• Literature/Schematics (1)
• Western Radio Manufacturing Co. 1929 catalogue

• Other Models

• Here you find 32 models, 10 with images and 6 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from High Frequency Laboratories (HFL); Chicago, IL