• Country
• Brazil

• Manufacturer / Brand
• Gradiente Eletrônica S.A.; São Paulo

• Year
• 1980 ??

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 273625

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

• Number of Transistors
• 41

• Semiconductors

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 100-120 / 120-130 / 220-240 / 240-260 Volt

• Loudspeaker
• - For headphones or amp.

• Power out
• 400 W (undistorted)

• Material
• Metal case

• from Radiomuseum.org
• Model: Direct Coupled Reference Power Amplifier A-1 - Gradiente Eletrônica S.A.; São

• Shape
• Rack

• Dimensions (WHD)
• 480 x 178 x 360 mm / 18.9 x 7 x 14.2 inch

• Notes

• Gradiente Direct Coupled Reference Power Amplifier Model A-1.
  2x 200 Watts RMS into 8 Ohms both channels driven, 20 - 20000Hz, 0,03% THD
  2x 350 Watts RMS into 4 Ohms both channels driven, 20 - 20000Hz, 0,05% THD
  Frequency response: 1Hz to 80000Hz
  Total harmonic distortion: 0.03%
  Damping factor: 200
  Input sensitivity: 1.5V
  Signal to noise ratio: 100dB
  Speaker load impedance: 4Ω (minimum)
  Power Consumption:
  600VA (8 Ohms)
  1100VA (4 Ohms)
  
  Semiconductors:
  41x Transistors, 11x IC's, 76x Diodes, 27 LED's
  
  
   

• Net weight (2.2 lb = 1 kg)
• 28.5 kg / 62 lb 12.4 oz (62.775 lb)

• Mentioned in
• - - Manufacturers Literature (Instruction Manual)

• Author
• Model page created by Franz Scharner. See "Data change" for further contributors.

• Other Models

• Here you find 34 models, 33 with images and 4 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Gradiente Eletrônica S.A.; São Paulo