7500 Ch= 12K25 + 7K31

Zenith Radio Corp.; Chicago, IL

  • Year
  • 1962 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 87094
    • alternative name: Chicago Radio Lab

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

 Technical Specifications

  • Number of Tubes
  • 19
  • Main principle
  • Superhet with RF-stage; ZF/IF 455/10700 kHz
  • Wave bands
  • Broadcast (BC) and FM or UHF.
  • Details
  • Changer (Record changer)
  • Power type and voltage
  • Alternating Current supply (AC) / 120 Volt
  • Loudspeaker
  • 7 or more Loudspeakers
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 7500 Ch= 12K25 + 7K31 - Zenith Radio Corp.; Chicago,
  • Shape
  • Console with any shape - in general
  • Notes
  • The Beitman schematic (R23) from 1963 shows the same schematic, chassis 12K25, for the models MK2670, MK2675, MK2685 and 7500. For the 2nd Audio/ Phase inverter, each channel uses either 6CG7 or 6FQ7. The 4 power tubes 6BQ5 drive twice 4 loudspeakers: 2 x 3.5" tweeter, a tweeter horn and a 12" woofer. The tubes for the second chassis, 7K31 are: 6CG7 6CG7 6BQ5 6BQ5 6BQ5 6BQ5 5U4GB.
  • Circuit diagram reference
  • Beitman Radio Diagrams Vol. 23, 1963
  • Author
  • Model page created by Egon Penker. See "Data change" for further contributors.

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