• Country
• Netherlands

• Manufacturer / Brand
• Audio Research Center; Rotterdam

• Year
• 1983

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 124562

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

• Number of Transistors
• 16

• Semiconductors

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 220 Volt

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

• Power out
• 25 W (unknown quality)

• from Radiomuseum.org
• Model: Ypsilon Eindversterker M-25 P831 - Audio Research Center;

• Notes
• Leistungs-Verstärker mit Transistoren, Klasse AB. Leistung 25 Watt an 8 Ohm (50 Watt an 4 Ohm), Klirr 0.05% (20 bis 20.000 Hz), S/N 100 dB bei 25W, 90 dB bei 1W, Slew rate 20V/µsec, Eingang 900 mVeff., Eingangsimpedanz 10k.
  Transistoren: 4× BC550B, 5× BC560B, 2× BC546B, BC556B, BD139, BD140, BDX66 und BDX67.

• Mentioned in
• -- Original-techn. papers. (Audio & Techniek 83/1:24-27 und 83/3:39-41 (1983).)

• Author
• Model page created by Aren van Waarde. See "Data change" for further contributors.

• Other Models

• Here you find 8 models, 3 with images and 8 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Audio Research Center; Rotterdam