• Country
• United States of America (USA)

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

• Year
• 1956/1957

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 69078

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

• Number of Transistors
• 7

• Semiconductors
• L-5113L L-5114L L-5114L L-5113L L-5021L L-5028 L-5028 1N527

• 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
• Dry Batteries / 3 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: T-7 Code 124 [Philco's first transistor radio] - Philco, Philadelphia Stg. Batt

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

• Dimensions (WHD)
• 7 x 1.75 x 4.25 inch / 178 x 44 x 108 mm

• Notes
• The Philco model T-7 series includes Philco's first transistor radio. The first version, model T-7 Code 124, was introduced in 1956 for the 1957 model year, and was followed by T-7 Code 126, which is identical in design except for slight circuit changes and one different transistor for the audio driver. Both of these versions have a painted metal perforated grill which is large enough and soft enough that the owner's thumbs and fingers could dent it just by picking it up. Model T-7X (also marked Code 128) was introduced in 1957 for the 1958 model year, and had an improved case with more durable plastic louvers instead of the perforated metal grill.

• External source of data
• Ernst Erb

• Circuit diagram reference
• Beitman Radio Diagrams Vol. 17, 1957

• Mentioned in
• Philco Home Radio Yearbook 1957; SAMS set 347 folder 11

• Literature/Schematics (1)
• Antique Radio Magazine n.59, February 2004, page 57. Article written in Italian and English.

• Literature/Schematics (2)
• Photofact Folder, Howard W. SAMS (Set 347 Folder 11 Date 2-57)

• Literature/Schematics (3)
• Silicon Chip February 2015, page 94.

• Other Models

• Here you find 4006 models, 2204 with images and 3656 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philco, Philadelphia Stg. Batt. Co.; USA