• Country
• United States of America (USA)

• Manufacturer / Brand
• United Air Cleaner Corp. - see also Sentinel

• Year
• 1929

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 63953

• • Brand: Sentinel

• Number of Tubes
• 8

• Valves / Tubes

• Main principle
• TRF without regeneration

• Tuned circuits
• 4 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• from Radiomuseum.org
• Model: 550 - United Air Cleaner Corp. - see

• Notes
• One dial (primary tuning control knob) Not to be confused with Sentinel 550 from 1934 !

• External source of data
• Ernst Erb

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

• Other Models

• Here you find 43 models, 11 with images and 25 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from United Air Cleaner Corp. - see also Sentinel