12L58 "Baby Stratosphere" Ch=1202

Zenith Radio Corp.; Chicago, IL

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  • Year
  • 1936
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 73027
    • alternative name: Chicago Radio Lab

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

 Technical Specifications

  • Number of Tubes
  • 12
  • Main principle
  • Superhet with RF-stage; ZF/IF 456 kHz; 3 AF stage(s)
  • Tuned circuits
  • 7 AM circuit(s)
  • Wave bands
  • Broadcast, Long Wave and 2 x Short Wave.
  • Power type and voltage
  • Alternating Current supply (AC) / 115 Volt
  • Loudspeaker
  • 2 Loudspeakers
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 12L58 "Baby Stratosphere" Ch=1202 - Zenith Radio Corp.; Chicago,
  • Shape
  • Console with any shape - in general
  • Dimensions (WHD)
  • 26 x 42 x 16.1 inch / 660 x 1067 x 409 mm
  • Notes
  • The model 58 or exact 12A58 "Baby Stratosphere" is the same as model "Baby Stratosphere" 12L58. 12L57 and 12L58 share the same schematic Rider's 7-23 through 7-25, Chassis 1202 and 1202A. The Rider's master index (1947) lists also the models 12A57 (with a centered medallion in the speaker grille) and 12A58 for the same schematics but on the schematics there is no indication of this. The same applies for Beitman (page 1-235).

    All these models have dual Electro Magnetic Dynamic loudspeakers (moving-coil with field excitation coil). Long wave is 150 to 370 kc, Broadcast is 550 to 1740, SW 2000 to 7000 kc and 7 mc to 22.5 mc. The two 6F6 are in push-pull, the 6C5 in parallel after a 6C5 as pre amplifier. One 6C5 works for the Shadowgraph. The rectifier tubes can also be 5Z4.

    In Stein, "Pre-War Consoles" 2000 you find the picture of the 16A61 on page 221 for these models "58". The picture 16A61 on page 222 is the 12A58 and 12L58.
  • Price in first year of sale
  • 160.00 $
  • Circuit diagram reference
  • Rider's Perpetual, Volume 7 = 1936 and before

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