• Country
• Japan

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

• Year
• 1968 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 258127

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

• Number of Transistors
• 8

• Semiconductors
• 2SA341 2SA101 2SA101 2SB173 2SB173 2SB175 2SB178 2SB178 OA90 OA90

• Main principle
• Superheterodyne (common)

• Wave bands
• Broadcast plus more than 2 Short Wave bands.

• Power type and voltage
• Batteries / addl. power jack / D: 4 x 1,5 / 6 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 10 cm = 3.9 inch

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: National Panasonic 4 Band 8 Transistor R-421 - Panasonic, Matsushita,

• Notes

• Frequency Range

  MW: 525 - 1605 kHz

  SW1: 1.6 - 4.5 MHz

  SW2: 4.5 - 12 MHz

  SW3: 12- 26.1 MHz

  Phono input, Tone switch, Two External Antenna & Earth terminals, Fine Tuning.

   

• Author
• Model page created by Daniel Rosha. See "Data change" for further contributors.

• Other Models

• Here you find 3002 models, 2778 with images and 628 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