• Country
• United States of America (USA)

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

• Year
• 1958

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 72195

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

• Number of Transistors
• 4

• Semiconductors
• 2N252 2N253 R186 2N185

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

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / AA: 4 x 1.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 2.75 inch = 7 cm

• Power out
• 0.025 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: T4J Code 124 - Philco, Philadelphia Stg. Batt

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Notes
• The Philco Model T-4J is a Battery operated 4 transistor portable AM Receiver. BC Band Tuning Range: 535 to 1620KHz. Earphone jack disconnects the speaker for private listening. Uses Qty(4) 1.5V AA cells. Cabinet is Ebony. The 2nd IF transistor R186 is reflexed as the 1st AF amplifier.

• Circuit diagram reference
• Beitman Radio Diagrams Vol. 19, 1959

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date 4-59, Set 437, Folder 10)

• Literature/Schematics (2)
• - - Manufacturers Literature

• Author
• Model page created by Hinrich Grensemann † 15.5.16. See "Data change" for further contributors.

• Other Models

• Here you find 4068 models, 2220 with images and 3711 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philco, Philadelphia Stg. Batt. Co.; USA