• Country
• United States of America (USA)

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

• Year
• 1926

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 44351

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

• Number of Tubes
• 9

• Valves / Tubes
• UX201A UX201A WX12 WX12 WX12 WX12 UX201A UX201A UX112

• Main principle
• Superheterodyne (common); 2 AF stage(s)

• 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: H.F.L. Nine in Line Super Heterodyne - High Frequency Laboratories

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

• Dimensions (WHD)
• 28.5 x 9 x 12.5 inch / 724 x 229 x 318 mm

• Notes

• Nine-In-Line Superheterodyne, 1926
  Tube Line Up: 01A...1st. Det. 01A...Oscillator 01A...1st. I.F. Amplifier 01A...2nd. I.F. Amplifier 01A...3rd. I.F. Amplifier 01A...4th. I.F. Amplifier 01A...2nd. Detector 01A...1st Audio 01A or 112A...Audio Output

  By 1927 it could have a UX112A with half of the cathode current than the UX112, but not before.

• External source of data
• Ernst Erb

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

• 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