Vibrator power unit 687

Eddystone (Brand), Stratton and Co., Ltd., Eddystone Radio Ltd.; Birmingham

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  • Year
  • 1947 ??
  • Category
  • Power supply/conditioner or battery or charger 
  • Radiomuseum.org ID
  • 304446

 Technical Specifications

  • Number of Tubes
  • 1
  • Valves / Tubes
  • 6X5G
  • Wave bands
  • - without
  • Power type and voltage
  • Storage Battery for all (e.g. for car radios and amateur radios) / 6 Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Vibrator power unit 687 - Eddystone Brand, Stratton and
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Notes

  • Designed to operate specific Eddystone receiver models from a six-volt accumulator.
    Model 687 is suitable for the 640, 710 and 740 receivers.
    Model 687/1 is suitable for the 750, 888 and 888A receivers, which have balanced heaters.
    The output cables terminate in octal plugs matching the sockets on the receivers.

    Consists of a non-synchronous vibrator, transformer, 6X5G rectifier and RF filtering but not smoothing as this is provided in the receivers.

    Total load about 6A.

  • Author
  • Model page created by Bruce Taylor. See "Data change" for further contributors.

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