• Country
• Japan

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

• Year
• 1954

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 74271

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

• Number of Tubes
• 4

• Valves / Tubes
• 1R5 1T4 1S5 3S4

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 1.5 & 67.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 6 cm = 2.4 inch

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: National PL-420A - Panasonic, Matsushita,

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

• Dimensions (WHD)
• 200 x 130 x 55 mm / 7.9 x 5.1 x 2.2 inch

• Notes

• Test-Export of 1000 radios for the US-Market. The decision made at that time was the first step in opening up and expanding the U.S. market. Earphone available.

  Note that the National brand could not be used in the USA and subsequently Panasonic was created as a brand.

  Model PL-420A uses a National BL-145B (Eveready 457, RCA VS-082, Burgess K-45)  battery. Model PL-420B uses the larger battery National BL-145 (Eveready 467, RCA VS-016, Burgess XX-45) - probably the cabinets differ in the internal layout or exterior dimensions.

• External source of data
• panasonic.co.jp

• Mentioned in
• -- Schematic

• Author
• Model page created by Ernst Erb. See "Data change" for further contributors.

• Other Models

• Here you find 3041 models, 2817 with images and 632 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