• Country
• United States of America (USA)

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

• Year
• 1961 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 136461

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

• Number of Transistors
• 7

• Semiconductors
• T-2091 T-1232 T-1232 T-1233 T-1002 T-1008 T-1008

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

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / AA: 2 x 1.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 2 inch = 5.1 cm

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: T-77BK Code 124 [black] - Philco, Philadelphia Stg. Batt

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

• Dimensions (WHD)
• 65 x 116 x 34 mm / 2.6 x 4.6 x 1.3 inch

• Notes

• Color: black. Sams photofact, set 574, folder 11, date 4-62 features the Philco models T-77AQ (aqua), T-77BK (black) and T-77IV (ivory) as the same schematic. Large tuning knob , small volume knob, earphone jack.

• Net weight (2.2 lb = 1 kg)
• 0.250 kg / 0 lb 8.8 oz (0.551 lb)

• Circuit diagram reference
• Beitman Radio Diagrams Vol. 22, 1962

• Mentioned in
• Bunis, Transistor Radios, 2nd ed., 1996, p. 204

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Set 574 folder 11 date 4-62)

• Literature/Schematics (2)
• Philco Service Manual, 1961

• Author
• Model page created by Peter Hoddow. See "Data change" for further contributors.

• Other Models

• Here you find 4041 models, 2217 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