• Country
• United States of America (USA)

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

• Year
• 1952/1953 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 77496

• • alternative name: Chicago Radio Lab

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

• Number of Tubes
• 7

• Valves / Tubes
• 6BJ6 12AT7 6BJ6 12BA6 12AU6 19T8 or 19C8 35C5

• Main principle
• Superhet with RF-stage; ZF/IF 455/10700 kHz; 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)     9 FM circuit(s)

• Wave bands
• Broadcast (BC) and FM or UHF.

• Power type and voltage
• Alternating Current supply (AC) / 60Hz, 117V=110-120 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5.25 inch = 13.3 cm

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: J733Y Ch= 7J03 - Zenith Radio Corp.; Chicago,

• Shape
• Tablemodel with Clock ((Alarm-) Clock Radio).

• Notes

• Zenith model J733Y is an AC operated AM-FM superheterodyne receiver with electric clock.
  Selenium Rectifier.
  In the journal (Radio-) Television Retailing November 1952 this model is shown as "The new Super De Luxe" - a clock radio with all the de luxe features ... plus one more tube for extra distance. The same advertisement also shows pictures for models K515, K518, K622 and J733 (with "Super-Sensitive FM". The prefix "K" is for 1953 and "J" is for 1952.

• Price in first year of sale
• 74.95 $

• Circuit diagram reference
• Beitman Radio Diagrams Vol. 12, 1952

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Set 186, folder 17, dated 11-52)

• Literature/Schematics (2)
• Radio Retailing (Radio & Television R.) (Television Retailing November 1952, page 77.)

• Author
• Model page created by Arpad Roth † 27.3.17. See "Data change" for further contributors.

• Other Models

• Here you find 4517 models, 4108 with images and 3646 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Zenith Radio Corp.; Chicago, IL