• Country
• Japan

• Manufacturer / Brand
• Panasonic, Matsushita, National ナショナル (also tubes); Osaka

• Year
• 1960 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 161601

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

• Number of Transistors
• 10

• Semiconductors
• 2SA103 2SA102 2SA102 2SA101 2SA101 2SB171 2SB171 2SB171 2SB172 2SB172 OA70 MA23

• Main principle
• Superhet with RF-stage; ZF/IF 455 kHz; 3 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast and Short Wave (SW).

• Power type and voltage
• Dry Batteries / C: 4 x 1,5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 3 inch = 7.6 cm

• Power out
• 0.15 W (0.25 W max.)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: National 10-Transistor 2-Band T-28U - Panasonic, Matsushita,

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

• Notes

• National T-28U 10-Transistor 2-Band;

  Frequency Range

  MW: 540 - 1600 kHz

  SW: 3.9 - 10 MHz

  
  Two earphone jacks, External antenna terminal, sold with brown leather case.

  See also model T-28T with different  SW band reception.

• Source of data
• -- Schematic

• Author
• Model page created by a member from A. See "Data change" for further contributors.

• Other Models

• Here you find 2987 models, 2764 with images and 621 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Panasonic, Matsushita, National ナショナル (also tubes); Osaka