Speech Amplifier NSA

National Company; Cambridge & Malden (MA)

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  • Year
  • 1938–1941
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 109869
    • alternative name: National Toy Co.
    • Brand: Thrillbox

 Technical Specifications

  • Number of Tubes
  • 0
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 110 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 15 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Speech Amplifier NSA - National Company; Cambridge &
  • Shape
  • Boatanchor (heavy military or commercial set >20 kg).
  • Notes

  • High-Fidelity push pull speech amplifier. 25 Hz - 10000 Hz ± 1 dB.

    Two input channels: one for crystal microphone and one for a phonograph/

  • Net weight (2.2 lb = 1 kg)
  • 50 lb (50 lb 0 oz) / 22.7 kg
  • Price in first year of sale
  • 125.00 $
  • Source of data
  • -- Original prospect or advert
  • Mentioned in
  • National Company 1941 Catalog
  • Literature/Schematics (1)
  • Allied Catalog 1939 page 101
  • Author
  • Model page created by Otto Frosinn. See "Data change" for further contributors.

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