• Country
• United States of America (USA)

• Manufacturer / Brand
• Monitoradio; Indianapolis (IN)

• Year
• 1954/1955

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 141047

• • alternative name: Radio Apparatus Corp.; Indianap.

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

• Number of Tubes
• 6

• Valves / Tubes
• 12AT7 6BJ6 6BJ6 12AX7 50C5 35W4

• Main principle
• Superheterodyne (common); ZF/IF 10700 kHz; 2 AF stage(s)

• Tuned circuits
• 8 AM circuit(s)

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• AC/DC-set / 117V = 110 -120 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: AR-4 - Monitoradio; Indianapolis IN

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 10.5 x 7 x 6.5 inch / 267 x 178 x 165 mm

• Notes

• The Monitoradio Model AR-4 is an AC/DC Operated 6 Tube AM Communications Receiver.
  Tuning Range 108 - 136MHz (AM).

   

• Price in first year of sale
• 66.50 $

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date 3-56, Set 308, Folder 7)

• Literature/Schematics (2)
• Montgomery Ward Catalogs (Wards, Airline) (Fall/Winter 1954/55, page 664.)

• Author
• Model page created by Egon Penker. See "Data change" for further contributors.

• Other Models

• Here you find 27 models, 22 with images and 24 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Monitoradio; Indianapolis (IN)