• Country
• United States of America (USA)

• Manufacturer / Brand
• Hetro Electrical Industries; Chicago, IL

• Year
• 1938

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 44325

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

• Number of Tubes
• 8

• Valves / Tubes
• 6K7 6A8 6K7 6H6 6G5 6F5 6L6 5V4G

• Main principle
• Superhet with RF-stage; ZF/IF 456 kHz; 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast, Short Wave(s) and Police.

• Details
• Record Player (perh.Changer)

• Power type and voltage
• Alternating Current supply (AC) / 100; 115; 125; 220; 240 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• from Radiomuseum.org
• Model: HP-85 - Hetro Electrical Industries;

• Notes
• BC (530-1750 kHz), TROP (1600-5400 kHz) and SW (5.6-17.5 MHz) bands. Tuning eye.

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 9 = 1938 and before

• Other Models

• Here you find 79 models, 5 with images and 74 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Hetro Electrical Industries; Chicago, IL