• Country
• United States of America (USA)

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

• Year
• 1936

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 67511

• • alternative name: Chicago Radio Lab

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

• Number of Tubes
• 4

• Valves / Tubes
• 6A7 6F7 42 80

• Main principle
• Superheterodyne (common); ZF/IF 456 kHz

• Wave bands
• Broadcast (MW), Police, sometimes also early TV (75-200m).

• Power type and voltage
• Alternating Current supply (AC) / 115 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 4P51 Ch=5401 - Zenith Radio Corp.; Chicago,

• Shape
• Console with any shape - in general

• Dimensions (WHD)
• 22.3 x 35.3 x 11 inch / 566 x 897 x 279 mm

• Notes

• small console

  Model 4-P-51 uses the same cabinet as models 4-T-51 chassis 5401, chassis 5403 early, chassis 5403 late, and model 4-V-59, chassis 5405.  Riders says the models use two wavebands, broadcast 550-1600kc. and shortwave 1550-3650kc.  Model 4-T-51 after serial number 54439 uses the wave bands broadcast 545-1600kc. and shortwave 1520-4850kc.

  Model 4-V-59 has a round dial. Model 4-P-51 has a cornered dial. The dial for the 4-T-51 models is unknown. Maybe 4-T-51 chassis 5403 late began with the round dial.

   

   

   

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 6 = 1935 and before

• Mentioned in
• Zenith Radio The Glory Years 1936-1945

• Other Models

• Here you find 4491 models, 4096 with images and 3595 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Zenith Radio Corp.; Chicago, IL