RD Junior Stereo Amplifier

Rogers, Catford (see also Rogers Birmingham)

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  • Year
  • 1960 ?
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 356927

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

 Technical Specifications

  • Number of Tubes
  • 7
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 50/60 Hz, 110-115, 50 Hz 220-230 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Power out
  • 24 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: RD Junior Stereo Amplifier - Rogers, Catford see also
  • Shape
  • Chassis only or for «building in»
  • Dimensions (WHD)
  • 14 x 5.375 x 8 inch / 356 x 137 x 203 mm
  • Notes

  • The RD Junior Stereo Amplifier was developed from the successful RD Junior Mono Amplifier. This stereo version incorporates all the features of the original design, along with several enhancements, making it suitable for use with either the Junior III or Master Stereo Control Units.

    Technical Specifications

    • Power Output: Nominal: 12 + 12 watts, ​​Peak: 15 + 15 watts
    • Sensitivity: 750 mV for 12 watts output
    • Harmonic Distortion: 2% at 1,000 Hz (12 watts)
    • Frequency Response: ±0.25 dB from 20 Hz to 20,000 Hz
    • Negative Feedback (NFB): 20 dB ±1 dB from 30 Hz to 20,000 Hz
    • Damping Factor: 20
    • Hum and Noise: -85 dB below 12 watts
    • Crosstalk: 70 dB at 1 kHz
    • Output Impedance Options: 4 ohms, 8 ohms, and 16 ohms
    • Spare Power Available: 300V at 40 mA, 6.3V at 2.5A
    • Power Consumption: 125 watts

    Features

    • Output Transformers: High-grade multi-section transformers with grain-oriented laminations.
    • Inductance Smoothing: Features a dual choke filter for improved performance.
    • Dual AC Outlets: Provides additional connectivity options.
    • Speaker Phasing Switch: Allows for easy adjustment of speaker phase.

    Finish and Pricing

    • Chassis Finish: Stove-enamelled dark maroon.
    • Transformers Finish: Hammer silver grey.
    • Price: £28 10s (tax-free)
  • Net weight (2.2 lb = 1 kg)
  • 22 lb (22 lb 0 oz) / 9.988 kg
  • Price in first year of sale
  • 28.50 GB £
  • Mentioned in
  • -- Original prospect or advert (Catalogue of High-Fidelity Equipment and Accessories Jul 1961, Page 7.)
  • Author
  • Model page created by Gary Cowans. See "Data change" for further contributors.

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