• Year
  • 1958 ??
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 193581

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

 Technical Specifications

  • Number of Transistors
  • 8
  • Main principle
  • Superheterodyne (common); ZF/IF 455 kHz; 3 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast and Short Wave (SW).
  • Power type and voltage
  • Dry Batteries / 6 x 1,5 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 12 cm = 4.7 inch
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: National 2 Band 8 Transistor DB-421 HJ - Panasonic, Matsushita,
  • Shape
  • Tablemodel, with any shape - general.
  • Notes
  • The schematic drawing (ID=956435, between the photos) shows another transistor for the RF mixer: OC44 instead of MC101.

    It is also a general schematic for both DB-421 subtypes "H" and "J" while subtype "HJ" is mentioned on the lower right side but doesn't actually exist since it is mentioned nowhere else on the schematic. The difference between the 2 subtypes is the value of a few capacitors. The fact that "HJ" is mentioned as such on the schematic justifies this model.

    Frequency Range:

    • MW: 540 - 1630 kHz; this band has also a "local" setting for strong signals.
    • SW (subtype "H"): 3.8 - 12 MHz.
    • SW (subtype "J"): 7 - 16 MHz.
  • Author
  • Model page created by Keith Staines. See "Data change" for further contributors.

 Collections | Museums | Literature

Collections

The model National 2 Band 8 Transistor is part of the collections of the following members.

 Forum

Forum contributions about this model: Panasonic,: National 2 Band 8 Transistor DB-421 HJ

Threads: 1 | Posts: 1

Den Radio auf dem bildern sind hergestellt ende 1959, wahrscheinlich modelljahr 1960 geeignet.

Dasselbe gehäusse wurde auch von dem modell Matsushita/National AX-425 ( 5-röhren ) verwendet.

Christer Voigt, 15.Mar.11

Weitere Posts (1) zu diesem Thema.