• Country
• Japan

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

• Year
• 1969–1971

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 252661

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

• Number of Transistors
• 7

• Semiconductors
• 2SA102 2SA101 2SA101 2SB173 2SB175 2SB176 2SB176 OA90

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

• Wave bands
• Broadcast only (MW).

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

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / 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-138 - Panasonic, Matsushita,

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

• Dimensions (WHD)
• 5.4375 x 2.75 x 1.5 inch / 138 x 70 x 38 mm

• Notes

• National Model R138

  A seven-transistor BC portable radio. Tuning range 525 - 1605 kHz. Speakler 2" dynamic, output 250 mW. Separate tone control, precision roller tuning. Jack for earphone. Operates from three UM3 batteries. Separate leather carrying case. (MINGAY'S PRICE SERVICE)

  Available in Red & Black.

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

• Price in first year of sale
• 49.95 AUS $

• Mentioned in
• Mingay's Price Service (Aug 1969 to Feb 1971.)

• Literature/Schematics (1)
• J.R. Publications Transistor Radio Service Handbook (Group 7, 1970, Page N166.)

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

• Other Models

• Here you find 3040 models, 2816 with images and 630 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