• Country
• Japan

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

• Year
• 1968–1972

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 131752

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

• Number of Transistors
• 10

• Semiconductors
• 2SA341 2SA101 2SA101 2SB175 2SB172 2SB173 2SB175 2SB175 2SB178 2SB178 OA90 OA90

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

• Tuned circuits
• 5 AM circuit(s)

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

• Power type and voltage
• Dry Batteries / D: 3 x 1,5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 8 cm = 3.1 inch

• Power out
• 0.3 W (0.5 W max.)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: The Executive, National Panasonic 2 Band 10-Transistor R-237J - Panasonic, Matsushita,

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

• Dimensions (WHD)
• 8 x 5.15 x 1.66 inch / 203 x 131 x 42 mm

• Notes

• National Model R-237

  A 10-transistor, 2-diode, 2-band portable radio. Powered by three UM1 batteries.

  Features: flashing tuning indicator; roller dial and volume controls; 500 mw output; 3" dynamic speaker. Tone control. Whip antenna. Jacks for external speaker, antenna and earphone. Frequency range: MW 525 - 1605 kHz; SW, 5.9 - 18 MHz. (MINGAY'S PRICE SERVICE)

  Sold with brown carrying leather case.

  See also model R-237H with different SW band reception.

• Net weight (2.2 lb = 1 kg)
• 1 lb 12 oz (1.75 lb) / 0.795 kg

• Price in first year of sale
• 75.00 AUS $

• Mentioned in
• Mingay's Price Service (Aug 1968 to Aug 1972.)

• Literature/Schematics (1)
• J.R. Publications Transistor Radio Service Handbook (Group C5, 1968, Page N150.)

• Author
• Model page created by Sándor Selyem-Tóth. See "Data change" for further contributors.

• Other Models

• Here you find 3052 models, 2829 with images and 634 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