Stereo Main Amplifier 305

Chapman,C.T. (Reproducers) Ltd.; London

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  • Year
  • 1959
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 343158

 Technical Specifications

  • Number of Tubes
  • 7
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Details
  • Hi-Fi equipment
  • Power type and voltage
  • Alternating Current supply (AC) / 100; 120; 200; 210; 220; 230; 240; 250 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 16 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Stereo Main Amplifier 305 - Chapman,C.T. Reproducers Ltd.;
  • Shape
  • Rack
  • Dimensions (WHD)
  • 12 x 7 x 5 inch / 305 x 178 x 127 mm
  • Notes

  • The Chapman 305 Stereo Amplifier is a compact double push-pull amplifier rated at 8 watts per channel.

    The ultra-linear output stage uses two EL84s in push-pull feeding a grain-oriented Partridge output transformer.

    This unit can be paired with the 305 Control Unit pre-amplifier. Voltages required to power this unit is provided by the power amplifier.

    Specifications:

    Input sensitivity: 350 m/V. RMS for 8 watts output
    Frequency response: Within 0.2 dB,30-20,000 Hz
    Power Output: 8 watts over the range of 30-20,000 Hz
    THD: At 8 watts, less than 0.1% at 1 kHz
    Intermodulation: 8 watts less than 1% with mixed frequencies.
    Hum and noise: Down 80 dB referred to 8 watts
    Output matching: 5 ohms and 3 ohms.
    Spare power: 250V. 30 mA HT and 6.3V 2 A LT
    Finish: Steel chassis sprayed matt gold with black ventilated cover.
  • Net weight (2.2 lb = 1 kg)
  • 15 lb 0 oz (15 lb) / 6.810 kg
  • Price in first year of sale
  • 21.00 GBP £
  • Mentioned in
  • -- Original prospect or advert (Hi-Fi News, August 1959, Page 156.)
  • Author
  • Model page created by Martin Kent. See "Data change" for further contributors.

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