• Country
• Japan

• Manufacturer / Brand
• Seiki Electronics Inc.

• Year
• 1980 ?

• Category
• Amateur-Receiver (amateur bands, may include broadcast bands)

• Radiomuseum.org ID
• 197191

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

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Wadley-Loop principle (including dual superhet)

• Wave bands
• Broadcast plus more than 2 Short Wave bands.

• Power type and voltage
• Alternating Current supply (AC) / 110; 117; 220 Volt

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

• Power out
• 2 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Century-21D - Seiki Electronics Inc.

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 325 x 140 x 230 mm / 12.8 x 5.5 x 9.1 inch

• Notes
• Century-21D: Communications receiver covering 0,5 - 30 MHz with Wadley Loop Circuitry and frequency counter, AM, USB / LSB.
  Successor of the quite popular analog readout model Century-21 and very similar if not identical to Lowe SRX-30D.

• Net weight (2.2 lb = 1 kg)
• 5 kg / 11 lb 0.2 oz (11.013 lb)

• Source of data
• -- Original-techn. papers.

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

• Other Models

• Here you find 4 models, 4 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Seiki Electronics Inc.