• Country
• United States of America (USA)

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

• Year
• 1931/1932

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 318344

• • Brand: Sentinel

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

• Number of Tubes
• 7

• Valves / Tubes
• 35 24 27 35 24 47 80

• Main principle
• Superhet with RF-stage; ZF/IF 175 kHz; 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / most probably 50 Hz, 220 Volt

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: 108A [export] - United Air Cleaner Corp. - see

• Shape
• Table-Cathedral-Type (upright, round top or gothic arch, not rounded edges only).

• Notes

• We have received a picture similar to Sentinel model 108A from a set in Switzerland. Yet we could not find this model here in any source in the US we only assume that it is an export model.

  The original schematic was drawn on January 21, 1931, by Leonard Tulauskas for model 108 chassis, used by the Sentinel also for the Super Midget 108A.

• External source of data
• Ernst Erb

• Source of data
• -- Collector info (Sammler)

• Literature/Schematics (1)
• Rider's Perpetual, Volume 2 = 1932 and before

• Author
• Model page created by Ernst Erb. See "Data change" for further contributors.

• Other Models

• Here you find 43 models, 11 with images and 24 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