• Country
• United States of America (USA)

• Manufacturer / Brand
• Minerva Radio Co.(post WW2); New York (NY)

• Year
• 1947

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 47321

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

• Number of Tubes
• 5

• Valves / Tubes
• 1R5 1T4 1S5 3Q4 117Z3

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Line / Batteries (any type) / AC/DC 105-125/ 90 & 9 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4.75 inch = 12.1 cm

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: 729 "Portapal" - Minerva Radio Co.post WW2; New

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

• Dimensions (WHD)
• 13 x 7.3 x 6.3 inch / 330 x 185 x 160 mm

• Notes
• Built-in loop antenna.

• Price in first year of sale
• 29.95 $

• External source of data
• Ernst Erb

• Source of data
• Collector's Guide to Antique Radios 4. Edition

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

• Mentioned in
• Radio Retailing (Radio & Television R.) (May 1947 page 49. June 1947 page 51.)

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Set 23, Folder 4713-14)

• Other Models

• Here you find 25 models, 21 with images and 20 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Minerva Radio Co.(post WW2); New York (NY)