• Country
• United States of America (USA)

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

• Year
• 1951

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 201922

• • alternative name: Chicago Radio Lab

• Number of Tubes
• 5

• Valves / Tubes
• 12BE6 12BA6 12J5 12AT6 50C5

• Main principle
• Superheterodyne (common)

• Wave bands
• Broadcast plus 2 Short Wave bands.

• Details
• Changer (Record changer)

• Power type and voltage
• Alternating Current supply (AC) / 110v Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 8 inch = 20.3 cm

• from Radiomuseum.org
• Model: H581-T - Zenith Radio Corp.; Chicago,

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 400 x 245 x 495 mm / 15.7 x 9.6 x 19.5 inch

• Notes
• This model has a small under-chassis metal rectifier below where a valve rectifier would normally be positioned, e.g. a 35W4. The Zenith label underneath the case has an above chassis layout showing the valve and trimmer location. However, the diagram indicates a specific valve location as being a 12AB6 - the actual valve in the set is a 12BA6. That is obviously a typo. 12BA6 is a suitable member of such a tube complement, while a 12AB6 is not found in any literature.

• Author
• Model page created by Terry Middlemiss. 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