Economy Mains Transformer

Radiospares Ltd.; London

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  • Year
  • 1955 ??
  • Category
  • Radio part (not a module) 
  • Radiomuseum.org ID
  • 356306

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • Alternating Current supply (AC) / 200-210; 220-230; 240-250 Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Economy Mains Transformer - Radiospares Ltd.; London
  • Shape
  • Miscellaneous shapes - described under notes.
  • Dimensions (WHD)
  • 72 x 86 x 95 mm / 2.8 x 3.4 x 3.7 inch
  • Notes

  • Radiospares manufactured a wide range of small transformers suitable for powering valved electronic equipment from AC mains. While primarily intended for the replacement market, they were popular for prototype development and some models were also used in production equipment such as Marshall audio amplifiers.

    The Radiospares 'Economy' Mains Transformer is intended for use in a conventional circuit with a double diode full-wave rectifier valve and has the following windings:

    Primary:
    Selectable 200-210 V, 220-230 V, 240-250 V 50 Hz
    (Yellow)

    Secondary:
    HT 250-0-250 V, 75 mA
    (Red-Black-Red)
    LT 6.3 V, 2 A
    (Blue)
    Rectifier heater 5 V, 2 A or 6.3 V, 1A
    (Brown-White or Brown-Orange)
    Screen
    (Violet)

    Unlike Radiospares 'Heavy-Duty' mains transformers, the windings are brought out directly, instead of being terminated by fixed solder tags. The minimum lead length is 25 cm. The transformer is vacuum impregnated and can be mounted upright or as a chassis drop-through.

    Made in England

     

  • Net weight (2.2 lb = 1 kg)
  • 1.724 kg / 3 lb 12.8 oz (3.797 lb)
  • Author
  • Model page created by Bruce Taylor. See "Data change" for further contributors.

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