• Year
  • 1956 ??
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 118182

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

 Technical Specifications

  • Number of Tubes
  • 5
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Details
  • Hi-Fi equipment
  • Power type and voltage
  • Alternating Current supply (AC) / 105-125 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 30 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: 80-AZ - Fisher Radio; New York NY
  • Shape
  • Book-shelf unit.
  • Dimensions (WHD)
  • 4.25 x 15.5 x 6.875 inch / 108 x 394 x 175 mm
  • Notes
  • Fisher model 80-AZ mono audio power amplifier, with speaker damping control "Z-Matic" and Peak Power Indicator, 3 separate feedback loops, two EL-37 power pentodes, unique cathode feedback circuit. Use directly with tuners such as 80-T, 80-R, FM-90X, with audio controls such as 80-C where low-level devices are employed.

    Specs: +/-1 db 30W 15-30,000 cps; 1M less than 1/2% @ 25W (0.2% @ 10W); frequency response uniform within 0.1 db 20-20,000, 1 db 10-100,000 cps; hum-noise better than 95 db below below full output; damping factor 26, internal impedance 0.61 ohms @ 16 ohm tap with Z-matic control counter-clockwise; phase shift less than 15deg @ 20 cycles, 18deg @ 20 kc; output impedances 4, 8, 16 ohms.
  • Net weight (2.2 lb = 1 kg)
  • 22 lb 0 oz (22 lb) / 9.988 kg
  • Price in first year of sale
  • 99.50 USD

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