• Country
• Japan

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

• Year
• 1966–1969

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 216508

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

• Number of Transistors
• 7

• Semiconductors
• 2SA103 2SA101 2SA101 2SB171 2SB175 2SB176 2SB176 OA90

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

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries / AA: 3 x 1.5 Volt

• Loudspeaker
• Permanent or electro-dynamic (moving coil), system not known yet. / Ø 2 inch = 5.1 cm

• Power out
• 0.25 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: 7 Transistor R-137 - Panasonic, Matsushita,

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

• Dimensions (WHD)
• 5.4375 x 2.75 x 1.34375 inch / 138 x 70 x 34 mm

• Notes

• National Model R137

  A seven transistor BC portable radio. Tuning range 525 - 1605 kC/s (kHz). Speaker, 2" dynamic; output 250 mW. Separate tone control; precision tuning; ferrite core aerial; jack for earphone. Operates from three Type UM3 batteries. (MINGAY'S PRICE SERVICE)

• Net weight (2.2 lb = 1 kg)
• 11 lb 8 oz (11.5 lb) / 5.221 kg

• Price in first year of sale
• 47.95 AUS $

• Mentioned in
• Mingay's Price Service (Feb 1967 to Feb 1969.)

• Literature/Schematics (1)
• J.R. Publications Transistor Radio Service Handbook (Group G7, 1970, Page N165.)

• Other Models

• Here you find 3053 models, 2830 with images and 635 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