• Country
• United States of America (USA)

• Manufacturer / Brand
• Radio Apparatus Co.; Pottstown, PA

• Year
• 1917–1922

• Category
• Radio module pre 1926 (not a part, not a key)

• Radiomuseum.org ID
• 196791

• Main principle
• Tuner pre 1926 (not a wave trap)

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Undamped Wave Set Type 93 - Radio Apparatus Co.; Pottstown

• Shape
• Tablemodel, with any shape - general.

• Notes
• The Radio Apparatus Company Type 93 Undamped wave set was already mentioned in an add for the Receiving Transformer model no. 50 - see the picture. Therefore we can put in 1917 as probably the market introduction. See also the type 36 Electron Detector in the same advertisement.

• Literature/Schematics (1)
• QST May 1917 page 44

• Author
• Model page created by Alan Larsen. See "Data change" for further contributors.

• Other Models

• Here you find 23 models, 21 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Radio Apparatus Co.; Pottstown, PA