• Country
• United States of America (USA)

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

• Year
• 1941 ?

• Category
• Miscellaneous (Other, Various) - see notes

• Radiomuseum.org ID
• 347847

• • alternative name: Chicago Radio Lab

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

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Radio Head Set Adapter S-8575 - Zenith Radio Corp.; Chicago,

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 2 x 2 x 1.5 inch / 51 x 51 x 38 mm

• Notes

• Headphone adapter for pre-war Zenith portable radios lacking headphone jacks, such as models 4K400, 5G500, 6G501 and 6G601. 

  Plugs in between speaker socket on chassis and plug on speaker cable. When switch is in one position, audio output is coupled directly to output transformer and speaker as normal. When switch is changed to other position, a 10k ohm 1/2 W resistor is switched in place of the audio output transformer primary, and two 0.01 µF capacitors couple the audio signal to a pair of pin jacks for connection of headphones. 

• Author
• Model page created by Hunter Compton. See "Data change" for further contributors.

• Other Models

• Here you find 4491 models, 4096 with images and 3603 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Zenith Radio Corp.; Chicago, IL