• Country
• United States of America (USA)

• Manufacturer / Brand
• Wireless Specialty Apparatus Co.; Boston (MA)

• Year
• 1919

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 199006

• Number of Tubes
• 2

• Valves / Tubes
• VT-Class-II or A_Moorhead VT-Class-II or A_Moorhead

• Main principle
• Audio-Amplification; 2 AF stage(s)

• Wave bands
• - without

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Wooden case

• from Radiomuseum.org
• Model: Two-Step Amplifier Type Triode B - Wireless Specialty Apparatus

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Dimensions (WHD)
• 7.5 x 11.38 x 6.25 inch / 191 x 289 x 159 mm

• Notes
• The Wireless Specialty Apparatus Company Two-Step Amplifier. This amplifier was commonly used with the IP-501 Receivers.

• Literature/Schematics (1)
• - - Manufacturers Literature (1919 Wireless Specialty catalog page 41)

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

• Other Models

• Here you find 68 models, 66 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Wireless Specialty Apparatus Co.; Boston (MA)