• Country
• United States of America (USA)

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

• Year
• 1960

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 87830

• • alternative name: Chicago Radio Lab

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

• Number of Tubes
• 5

• Valves / Tubes
• 12BE6 12BA6 12AT6 50C5 35W4

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• AC/DC-set / Either AC: 60 Hz, 110 to 120V or DC: 110 to 120 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 3.5 inch = 8.9 cm

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: B508R "The Majorette" Ch= 5Z05 - Zenith Radio Corp.; Chicago,

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 9.5625 x 5 x 5.375 inch / 243 x 127 x 137 mm

• Notes

• The Zenith B508R is an AC/DC operated 5 tube BC band receiver.  The BC band frequency tuning range is 535 to 1620kHz.  Has internal loop antenna. 

  The following models use the same chassis, schematic and cabinet but have different cabinet colors:

  Model	Chassis	Cabinet Color
  B508R	5Z05	Maroon with white front
  B508W	5Z05	White with white front

  The SAMS Photofact Set 353, Folder 17 calls out model Z508B, Z508L and Z508V. However the SAMS index for the B508 series refers to this same Set and Folder and so therefore is applicable for this model also. The same applies to the Beitman reference.

  WARNING:  One side of the AC line is connected to the chassis.  When servicing this radio, an isolation transformer should be used between the power line and the radio.

• Price in first year of sale
• 19.95 USD

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Set 353, folder 17 dated 4-57)

• Literature/Schematics (2)
• Beitman Radio Diagrams, Vol. 17, 1957 (Page 177)

• Author
• Model page created by Gonzalo Moncada-Jimenez. 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