• Country
• United States of America (USA)

• Manufacturer / Brand
• Philco, Philadelphia Stg. Batt. Co.; USA

• Year
• 1951/1952

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 51041

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

• Number of Tubes
• 4

• Valves / Tubes
• 1R5 1U4 1U5 3V4

• 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 117=105-125/ 67.5 & 1.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4.6 inch = 11.7 cm

• Power out
• 0.15 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: 52-640 - Philco, Philadelphia Stg. Batt

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

• Dimensions (WHD)
• 9.88 x 8 x 3.75 inch / 251 x 203 x 95 mm

• Notes

• Philco model 52-640 is a three power operated portable superheterodyne receiver with loop antenna. Selenium Rectifier. Color: Maroon.

• External source of data
• Ernst Erb

• Circuit diagram reference
• Beitman Radio Diagrams Vol. 12, 1952

• Literature/Schematics (1)
• Rider's Perpetual, Volume 23 (last) = covering up to 1954

• Literature/Schematics (2)
• Photofact Folder, Howard W. SAMS (Set 153, folder 12, dated 12-51)

• Literature/Schematics (3)
• Philco Folder 180-3436 for 1952.

• Other Models

• Here you find 4017 models, 2212 with images and 3664 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philco, Philadelphia Stg. Batt. Co.; USA