• Country
• Japan

• Manufacturer / Brand
• Yamaha Co.; Hamamatsu

• Year
• 1982

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 133477

• • alternative name: Nippon Gakki

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

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Wave bands
• - without

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

• Loudspeaker
• - This model requires external speaker(s).

• Power out
• 50 W (undistorted)

• Material
• Metal case

• from Radiomuseum.org
• Model: Natural Sound Stereo Amplifier A 420 - Yamaha Co.; Hamamatsu

• Shape
• Book-shelf unit.

• Dimensions (WHD)
• 430 x 110 x 300 mm / 16.9 x 4.3 x 11.8 inch

• Notes
• • La prima versione del 1982 impiegava un trasformatore di alimentazione standard e non toroidale. 

• Net weight (2.2 lb = 1 kg)
• 6 kg / 13 lb 3.5 oz (13.216 lb)

• Source of data
• - - Data from my own collection

• Author
• Model page created by Karl Reiter. See "Data change" for further contributors.

• Other Models

• Here you find 767 models, 734 with images and 380 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Yamaha Co.; Hamamatsu