Monoblock CMA15 Kitset

Radford Electronics Ltd.; Bristol

  • Año
  • 1962 ?
  • Categoría
  • Amplificador de audio o mezclador
  • Radiomuseum.org ID
  • 360485

 Especificaciones técnicas

  • Numero de valvulas
  • 5
  • Principio principal
  • Amplificador de Audio
  • Gama de ondas
  • - no hay
  • Tensión de funcionamiento
  • Red: Corriente alterna (CA, Inglés = AC) / 50 Hz, 200/240 Volt
  • Altavoz
  • - Este modelo usa altavoz exterior (1 o más).
  • Potencia de salida
  • 15 W (undistorted)
  • Material
  • Metálico con lámparas a la vista.
  • de Radiomuseum.org
  • Modelo: Monoblock CMA15 [Kitset] - Radford Electronics Ltd.;
  • Forma
  • Sobremesa, caja, normalmente con tapa (panel no inclinado).
  • Anotaciones
  • The Radford MA15 series of amplifiers was a well-regarded line of vacuum tube audio amplifiers produced in the 1960s.

    There were four versions:

    1. MA15 Mk1: This was the original version of the amplifier.
    2. MA15 Mk2 Early: An updated version of the original design.
    3. MA15 Mk2 Late: A further refinement of the Mk2 design.
    4. CMA15: This was a kit version of the MA15 amplifier.

    CMA15 (Kit Version)

    • Kit version of the MA15 likely based on the Mk2 Late design
    • Available for DIY enthusiasts to build themselves
    • Priced at approximately 60% of the fully assembled versions
    • Included detailed construction articles in Hi-Fi News (June to September 1962)

    Radford CMA15  Output Transformer (T2063G)

    • Resonance Frequency: The CMA15, the same as the Mk2 late output transformer was significantly improved, pushing its first resonance to approximately 150kHz.
    • Performance: This allowed for reduced phase shifts, better high-frequency stability, and lower distortion across the frequency range. It also enabled the amplifier to deliver its rated power up to 20kHz.
    • Design Complexity: The improved design contributed to a more refined sound and greater technical performance, addressing the limitations of the Mk1.

    These enhancements in the Mk2's & CMA15 output transformer were a critical factor in its superior performance compared to the Mk1.

    The kitset was priced at £17/15/- in August 1963.

  • Precio durante el primer año
  • 17.75 GB £
  • Mencionado en
  • -- Original prospect or advert (HiFi News (UK) Sep 1962)
  • Autor
  • Modelo creado por Gary Cowans. Ver en "Modificar Ficha" los participantes posteriores.

 Colecciones | Museos | Literatura

 Forum