• Country
• United States of America (USA)

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

• Year
• 1935 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 44341

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

• from Radiomuseum.org
• Model: 4Tube Pentode - High Frequency Laboratories

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 6 = 1935 and before

• Other Models

• Here you find 32 models, 11 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