• Country
• United States of America (USA)

• Manufacturer / Brand
• 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.

• Number of Tubes
• 19

• Valves / Tubes
• 6JK8 6BA6 6EQ7 6BN6 6AU6 6BC7 6BA6 6BE6 6EA8 6BN8 12AX7A 12AX7A 6CG7 6CG7 6BQ5 6BQ5 6BQ5 6BQ5 5U4GB

• 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.

• 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