• Year
  • 1968 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 87525
    • alternative name: Chicago Radio Lab

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

 Technical Specifications

  • Number of Transistors
  • 4
  • Semiconductors
  • Main principle
  • Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)
  • Tuned circuits
  • 4 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Alternating Current supply (AC) / 120 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm
  • Power out
  • 1 W (unknown quality)
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: N870J Ch= 4NT24Z2 - Zenith Radio Corp.; Chicago,
  • Shape
  • Tablemodel with Clock ((Alarm-) Clock Radio).
  • Notes
  • The Zenith model N870J is an AC operated 4 transistor AM clock radio. AM Tuning Range: 540 to 1600 KHz.
  • Circuit diagram reference
  • Beitman Radio Diagrams Vol. 27, 1967-69 (last vol.)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (Zenith Datasheet 107-1166)
  • Author
  • Model page created by Egon Penker. See "Data change" for further contributors.

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