• Country
• United States of America (USA)

• Manufacturer / Brand
• Zenith Radio Corp.; Chicago, IL

• 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.

• 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.

• Other Models

• Here you find 4496 models, 4101 with images and 3615 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Zenith Radio Corp.; Chicago, IL