• Country
• United States of America (USA)

• Manufacturer / Brand
• General Radio Company; Cambridge (MA)

• Year
• 1930 ??

• Category
• Radio part (not a module) 

• Radiomuseum.org ID
• 192661

• • alternative name: GenRad

• Main principle
• RF-Circuit or wave trap (separate, can also be an antenna with amp.)

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Variable Air Condenser 539-B - General Radio Company;

• Shape
• Tablemodel, with any shape - general.

• Notes
• General Radio Variable Air Condenser 539 B;
  46 - 1.034 pF.

• Author
• Model page created by a member from A. See "Data change" for further contributors.

• Other Models

• Here you find 238 models, 212 with images and 128 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from General Radio Company; Cambridge (MA)