Dynamic Reproducer 6H

Rola Company (AUS) Pty. Ltd.; Melbourne

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  • Year
  • 1947–1952
  • Category
  • Loudspeaker, headphone or earphone
  • Radiomuseum.org ID
  • 315912

 Technical Specifications

  • Wave bands
  • - without
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 6 inch = 15.2 cm
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Dynamic Reproducer 6H - Rola Company AUS Pty. Ltd.;
  • Notes

  • This loudspeaker has been designed principally for use in AC operation mantel and table model receivers, portable sound amplifiers, car radio receivers and battery and vibrator operated sets. However, it's applications extend to multiple loudspeaker installations, such as those used in hotels and factories, where a relatively low level of sound is required from each loudspeaker and where clear reproduction of speech is essential. It covers a wider range of frquencies than the Model 5C and will deliver a greater acoustic output than the the 5-inch type of loudspeaker.

    Power Handling Capacity 4 watts (6 watts peak)
    Fundamental Diaphragm Resonance 110-120 c.p.s. (Hz) (F81 Cone).
    Voice Coil Impedance 3.7 ohms at 400 c.p.s. (Hz)
    Transformer D. type Isocore transformer, attatched or detatched for chassis mounting.
    Principal Dimensions Overall diameter of diaphragm housing .. .. .. .. .. ..  6 9/16"
    Diameter of baffle opening .. .. .. .. .. .. .. .. .. .. .. ..  5½"
    Diameter of voice coil .. .. .. .. .. .. .. .. .. .. .. .. .. ..  ¾"
    Depth from pad-ring to rear, including transformer .. 3⅜"
    Mounting Four slots spaced 90º apart on a 6 3/16" pitch circle diameter. Dimensions of the slots 13/64" x 9/32". A speaker mounting bracket is fitted on the front plate. Two clearance holes for 3/16" screws are provided a 2¼" centres.
    Finish Diaphragm housing bright cadmium plated; magnet black and lacquered, transformer can silver lacquered.
    Weight 1 lb. 12 ozs. (with transformer).

    REPLACEMENT INFORMATION

    Model 6H can be used to replace Electro-dynamic types DP5B and F5B and Permanent Magnet types F5B PM, 6/6, 6/8, 6/11, and 6/12. When it is used to replace Models DP5B and F5B a Rola type 7/70 choke should be used in place of the field winding of the electro-dynamic loudspeaker and the difference between the d.c. resistance of the choke and that of the old loudspeaker field made up with a wire-wound resistor of suitable watt rating.

  • Literature/Schematics (1)
  • - - Manufacturers Literature (Rola Loudspeaker Data. (Date unknown))
  • Author
  • Model page created by Martin Kent. See "Data change" for further contributors.

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