• Country
• Japan

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

• Year
• 1965–1969

• Category
• Sound/Video Recorder and/or Player

• Radiomuseum.org ID
• 316882

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

• Number of Transistors
• 6

• Semiconductors
• 2SB173 2SB175 2SB175 2SB324 2SB324 2SB172 16C-4

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Details
• Tape Recorder

• Power type and voltage
• Alternating Current supply (AC) / 110; 220 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical

• Power out
• 1.5 W (max.)

• from Radiomuseum.org
• Model: National RQ-503S - Panasonic, Matsushita,

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 11.125 x 5 x 9.625 inch / 283 x 127 x 244 mm

• Notes

• National Model RQ-503S

  Two-speed, twin-track AC-operated six transistor tape recorder. Features special "error guard" switch which ensures no errors in recording. Pause lever and index counter, Speeds, 3¾ and 1⅞ ips. Power consumption of approximately 40W with an output of 1.5W. Sound monitor system enables monitoring through inbuilt speaker while recording, thus enabling use as a public address system. Neon lamp for recording level.

  Specifications: frequency response 100-7000 c/s (Hz) at 3¾ ips and 100-4000 c/s (Hz) at 1⅞ ips. Recording system AC bias 33 kC/s (kHz); 6" x 3" dynamic speaker. Accessories: recording tape 5", dynamic microphone and radio cord. (MINGAY'S PRICE SERVICE)

• Net weight (2.2 lb = 1 kg)
• 8 lb 14 oz (8.875 lb) / 4.029 kg

• Price in first year of sale
• 94.50 AUS $

• Mentioned in
• Mingay's Price Service (Feb 1966 to Feb 1969.)

• Literature/Schematics (1)
• -- Original-techn. papers. (National Tape Recorder Service Handbook, Page 23.)

• Literature/Schematics (2)
• J.R. Tape Recorder Handbook, Page N18.

• Author
• Model page created by Martin Kent. See "Data change" for further contributors.

• Other Models

• Here you find 3034 models, 2810 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