• Country
• United States of America (USA)

• Manufacturer / Brand
• Acme Apparatus Co.; Cambridge (MA)

• Year
• 1922

• Category
• Radio part (not a module) 

• Radiomuseum.org ID
• 219588

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Various materials

• from Radiomuseum.org
• Model: Amplifying Transformer A-2 - Acme Apparatus Co.; Cambridge

• Notes
• Amplifying Transformer A-2.

• Price in first year of sale
• 5.00 $

• Mentioned in
• Radio Broadcast, Jul. 1922, p. 263

• Author
• Model page created by Hans-Joachim Korn † 16.11.15. See "Data change" for further contributors.

• Other Models

• Here you find 21 models, 20 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Acme Apparatus Co.; Cambridge (MA)