• Country
• United States of America (USA)

• Manufacturer / Brand
• Sentinel Radio Corp., Evanston, Illinois

• Year
• 1947/1948

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 57552

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

• Number of Tubes
• 4

• Valves / Tubes
• 1R5 1T4 1S5 3Q4

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Line / Batteries (any type) / 117 / 67, 5 & 3 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: 286 PR or 286-PMI or 286-PBI or 286-PM - Sentinel Radio Corp., Evanston

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 8 x 4 x 4 inch / 203 x 102 x 102 mm

• Notes

• Line supply = AC or DC - battery: 67,5V = +B 1,5V x 2 =A (filament). Selenium rectifier and 68 ohm resistor (item 40 and 23) are used in model 286PR only. 117Z3 tube is used in model 286P only. Built in loop antenna. Two-tone plastic cabinets available in variety of colors. Ad in the "Saturday Evening Post, Mai 1, 1948: The models are 316 PM, 286 PR, 296 M, probably 314-I plus yet unknown model with 4 knobs, probably the model 294 T.

  The Sentinel model 286-PR is in Red and Black, model 286-PMI in Maroon and Ivory, model 286-PBI in Black and Ivory and model 286-PM in all Maroon.

  A Sentinel Folder for season 1947/48 shows the following models together: 285, 286, 289, 296, 298, 302, 305, 309, 313, 314, 315 and 316 in different colors, for instant suffix "I" for Ivory and "W" for Walnut.

• External source of data
• Ernst Erb

• Source of data
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Circuit diagram reference
• Rider's Perpetual, Volume 16 = ca. 1948 and before

• Mentioned in
• Collector's Guide to Antique Radios 4. Edition

• Literature/Schematics (1)
• Radio Retailing (Radio & Television R.) (April 1947 page 42. 1947 ad in Saturday Evening post - and May 1, 1948.)

• Literature/Schematics (2)
• Table Top Radios Vol. 1 Stein 98 (page 140.)

• Literature/Schematics (3)
• Shown for Season 1947/48 in a Sentinel Folder.

• Other Models

• Here you find 705 models, 349 with images and 596 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sentinel Radio Corp., Evanston, Illinois