• Country
• United States of America (USA)

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

• Year
• 1952/1952 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 51044

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

• Number of Tubes
• 5

• Valves / Tubes
• 1T4 1R5 1U4 1U5 3V4

• Main principle
• Superhet with RF-stage; ZF/IF 265 kHz; 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Line / Batteries (any type) / AC/DC 110-120 / 90 & 9 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4.5 inch = 11.4 cm

• Power out
• 0.18 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: 52-643 - Philco, Philadelphia Stg. Batt

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

• Dimensions (WHD)
• 11.25 x 8.5 x 5.5 inch / 286 x 216 x 140 mm

• Notes

• Selenium Rectifier. Color: Brown.

  Following is replacement information for internal capacitors C4 (inside RF transformer Z1), TC2 and TC3 (inside I.F. transformer Z2), and TC4 and TC5 plus two 100pF (inside I.F. transformer Z3).  These capacitors often fail due to silver migration shorts.  Shorting of these capacitors usually results in poor reception and continuous noise. The values listed were determined for Philco part numbers 32-4399, 32-4160-2, and 32-4240-6.

     C4:  10pF on schematic but plate area appears to be in the 3 to 5pF range.  Try a smaller value if 10pF causes problems.

     TC2, TC4, and two additional in Z3:  100pF

     TC3 and TC5:  75pF

  Note that the input and output windings of the I.F. transformers are not the same and care must be taken to avoid reversing the transformers when replacing the capacitors.  Typically, all of the capacitors are removed from the aluminum enclosures and new capacitors are wired to the transformer terminals after they are remounted on the radio chassis.

• External source of data
• Ernst Erb

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

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

• Mentioned in
• The Radio Collector's Directory and Price Guide 1921 - 1965 (Rider's Perpetual, Volume 23 (last))

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date 3-52, Set 161 Folder 7)

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

• Other Models

• Here you find 4041 models, 2218 with images and 3690 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philco, Philadelphia Stg. Batt. Co.; USA