• Year
  • 1929 ??
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 214518

 Technical Specifications

  • Number of Tubes
  • 2
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Power type and voltage
  • Powered by external power supply or a main unit. / 12 & 90 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Amplifier 49A or 49B - Western Electric Company Inc.;
  • Shape
  • Chassis only or for «building in»
  • Notes
  • Sound-on-film photoelectric cell preamplifier. The 49B got more reliable filament rheostats than the 49A. Otherwise both models are identical. There are 49As around with rheos replaced, hence completely identical to the 49B.

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