Dynamic Reproducer 5C

Rola Company (AUS) Pty. Ltd.; Melbourne

Data
Forum
Pictures
Collections

  • Year
  • 1946–1954
  • Category
  • Loudspeaker, headphone or earphone
  • Radiomuseum.org ID
  • 313923

 Technical Specifications

  • Wave bands
  • - without
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm
  • from Radiomuseum.org
  • Model: Dynamic Reproducer 5C - Rola Company AUS Pty. Ltd.;
  • Notes

  • The Model 5C is Australias best known loudspeaker. It was primarily designed to replace 5-inch electro-dynamic loudspeakers in AC operated receivers and its success in this field is demonstrated by the fact that, to date, more than 250,000 Model 5C loudspeakers have been sold. In the Model 5C, the absence of a heat-radiating field winding has permitted manufacturers to produce more compact and more efficient receivers. Model 5C is also widely used in small portable amplifiers, in portable and car radio receivers and in many other applications where a compact loudspeaker is required. When used with the small Type G Isocore Transformer it has special application in battery portables.

    Power Handling Capacity 2½ watts.
    Fundamental Diaphragm Resonance 130-140 c.p.s. (Hz) (F90 Cone).
    Voice Coil Impedance 3.7 ohms at 400 c.p.s. (Hz)
    Transformer When model 5C is used in AC or AC/DC or vibrator operated receivers, it is supplied with a type E (non-Isocore) transformer attached. When used with battery operated receivers, the Isocore type D transformer should be used detached or type G attached. The use of this speaker with the E type transformer with battery operated receivers is not recommended and when used under these conditions is covered by restricted warranty only
    Principle Dimensions Overall diameter of diaphragm housing .. .. .. .. .. .. . 5"
    Diameter of baffle opening .. .. .. .. .. .. .. .. .. .. .. .. . 4"
    Diameter of voice coil  .. .. .. .. .. .. .. .. .. .. .. .. .. .. . ⅝"
    Depth from pad-ring to rear including transformer .. .. 2 7/16"
    Mounting Eight holes each 13/64" equally spaced on a 4 11/16" pitch circle diameter, plus a mounting bracket fitted to the front plate. The mounting bracket has two slots to clear 5/32" screws at 1¾" centres.
    Finish Diaphragm housing, speaker mounting bracket and transformer clamp, bright cadmium plated, magnet black laquered.
    Weight 16 ozs. (with transformer).

    Replacement Information

    Model 5C can be used to replace Electro-dynamic types F4 and K5 and Permanent Magnet types F4PM, 5/4, 5/6, 5/7, 5/9, 5/11, and 5/15. When it is used to replace Models F4 and K5 a Rola type 7/70 choke should be used in place of the field winding of the electro-dynamic type 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.

 Collections | Museums | Literature

 Forum