• Country
• Japan

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

• Year
• 1964/1965

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 184670

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

• Number of Transistors
• 7

• Semiconductors
• 2SA101 2SA101 2SA102 2SB173 2SB175 2SB176 2SB176 OA70

• Main principle
• Superheterodyne (common)

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 4 x 1,5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 2.5 inch = 6.4 cm

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: National Panasonic Super Sensitive 7 R-147 - Panasonic, Matsushita,

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

• Dimensions (WHD)
• 6 x 3.5525 x 1.975 inch / 152 x 90 x 50 mm

• Notes

• National Model R-147

  A seven transistor, one diode, one band portable radio. Extremely sensitive. Housed in attractive leather cabinet which can be opened at the back for easy battery replacement.

  Features: highly sensitive built-in ferrite rod antenna, 2-step tone control switch. A rich tone is obtained by the 2½" PM dynamic speaker.

  Specifications: frequency range 540-1600 kC/s (kHz) with power output of 250 mW. Intermediate frequency 455 kC/s (kHz). 4 x UM-3 (AA cells) National batteries. Weight & price includes batteries. (MINGAY'S PRICE SERVICE)

• Net weight (2.2 lb = 1 kg)
• 1 lb 0 oz (1 lb) / 0.454 kg

• Price in first year of sale
• 24.15 AUS £

• Mentioned in
• Mingay's Price Service (Feb 1965 & Aug 1965.)

• Literature/Schematics (1)
• - - Manufacturers Literature (National Panasonic Radio Service Data No. 288)

• Literature/Schematics (2)
• J.R. Publications Transistor Radio Service Handbook (Group 1, 1964, Page N93.)

• Author
• Model page created by Reg Gauci. See "Data change" for further contributors.

• Other Models

• Here you find 3039 models, 2815 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