• Year
  • 1935
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 44698

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 7
  • Main principle
  • Audio-Amplification; 2 AF stage(s)
  • Power type and voltage
  • Alternating Current supply (AC) / 115 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
  • from Radiomuseum.org
  • Model: Grand Amplifier - Howard Radio Company; Chicago
  • Notes
  • Audio amplifier for Howard Grand Tuner models. Push-pull AF amplifier using 2 times two 42 tubes in parallel.
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 6 = 1935 and before

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