• Country
• Australia

• Manufacturer / Brand
• Silicon Chip Publications Pty. Ltd; Brookvale NSW

• Year
• 2014/2015

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 324322

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

• Number of Tubes
• 8

• Valves / Tubes
• 12AX7 12AX7 12AX7 12AX7 6L6 6L6 6L6 6L6

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Audio-Amplification; Hi-Fi-High End products

• Power type and voltage
• Alternating Current supply (AC) / 240 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Printed Circuit Board

• from Radiomuseum.org
• Model: Currawong 2x10W RMS Stereo Valve Amplifier Kit - Silicon Chip Publications Pty.

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 294 x 186 x 304 mm / 11.6 x 7.3 x 12 inch

• Notes

• The Currawong amplifier is a stereo audio amplifier based on a design by Grant Wills in 2003 incorporating cheap, readily available 100V audio line transformers with the line impedance taps used in the class-AB ultra-linear output stage.

  The Silicon Chip design used two 12AX7’s as pre-amp and phase splitter with two 6L6 beam power Triodes as the push-pull output stage, per channel. It also incorporated a delayed B+ soft start circuit.

  It was described in Silicon Chip in November, December 2014 and January 2015.

  It sold on kit form, without a case from Altronics Pty. Ltd. for around $700.

  The Editor of Silicon Chip, Nicholas Vinen explains that the Currawong name recognises the very musical call of the bird.

  A Pied Currawong is an Australian native bird about the size of a Crow or Raven and is mostly all black except for the telling white wing & tail feathers. Known for its melodious calls, the species' name currawong is believed to be of indigenous origin.

   

  Output power:	2 x 10W (8Ω, 6Ω), 2 x 9W (4Ω)
  Operating mode:	Class-A (8Ω), Class-A/AB (6Ω, 4Ω)
  Input sensitivity:	1V RMS (8Ω, with feedback enabled)
  Signal-to-noise ratio:	77dB
  Channel separation:	>60dB, 20Hz-20kHz (4Ω, 6Ω & 8Ω)
  Harmonic distortion:	typically, <0.1%, 6Ω & 8Ω
  Frequency response:	±0.6dB, 30Hz-20kHz
  Damping factor:	>20 (8Ω), >10 (4Ω)
  Mains power draw:	typically, 120-130W

• Price in first year of sale
• 700.00 AUS $

• Mentioned in
• Silicon Chip Magazine Nov, Dec 2014, Jan 2015

• Author
• Model page created by Gary Cowans. See "Data change" for further contributors.

• Other Models

• Here you find 2 models, 1 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Silicon Chip Publications Pty. Ltd; Brookvale NSW