Dynamic Reproducer 3C

Rola Company (AUS) Pty. Ltd.; Melbourne

Dati
Forum
Immagini
Collezioni

  • Anno
  • 1946–1952
  • Categoria
  • Altoparlante, cuffia o auricolare
  • Radiomuseum.org ID
  • 311365

 Specifiche tecniche

  • Principio generale
  • Amplificatore audio
  • Altoparlante
  • AP magnetodinamico (magnete permanente e bobina mobile) / Ø 3 inch = 7.6 cm
  • Materiali
  • Vari materiali
  • Radiomuseum.org
  • Modello: Dynamic Reproducer 3C - Rola Company AUS Pty. Ltd.;
  • Forma
  • Chassis o in scatola da montaggio
  • Dimensioni (LxAxP)
  • 90 x 90 x 60 mm / 3.5 x 3.5 x 2.4 inch
  • Annotazioni

  • This was the first post-war model Rola loudspeaker to be made for the domestic radio receiver market. During the war Model 3C was supplied to the Services for use in walkie-talkie sets and proved itself in the jungles of New Guinea and the islands of the Pacific. In this model the use of Anisotropic Alnico magnet results in a much higher electro-acoustic output than that usually obtained from loudspeakers of this size and this makes possible the design of ultra small and "personal portable" receivers. Model 3C can also be used in midget AC receivers and for amplifier monitoring. Inter-office communication systems have also been designed around the Model 3C.

    Power Handling Capacity .5 watts max.
    Fundamental Diaphragm Resonance 225-250 c.p.s. (F94 Cone).
    Voice Coil Impedance 3.7 ohms at 400 cycles.
    Transformer "G" type isocore, attached, or detached for chassis mounting
    Principal Dimensions Diaphragm Housing .. .. .. .. .. .. .. .. .. .. .3 9/16" x 3 9/16"
    Maximum overall height including transformer .. .. .. 4 1/16"
    Diameter of baffle opening.. .. .. .. .. .. .. .. .. .. .. .. . 2¾"
    Diameter of voice coil.. .. .. .. .. .. .. .. .. .. .. .. .. .. . ½"
    Depth from pad-ring to rear, including transformer .. 2 9/32"
    Mounting Four holes .196" spaced 90º apart on a pitch circle diameter of 3 15/16"
    Finish Diaphragm housing and transformer mounting bracket bright cadmium plated, magnet black, laquered can and transformer silver laquered.
    Weight 6½ ozs.(without transformer, 8½ ozs. (with transformer).

    Superseded by Fluxmaster Model 3C.

  • Peso netto
  • 0.135 kg / 0 lb 4.8 oz (0.297 lb)
  • Letteratura / Schemi (1)
  • - - Manufacturers Literature (Rola Loudspeaker Data & various Rola Technical Bulletins.)
  • Autore
  • Modello inviato da Joshua Boxer. Utilizzare "Proponi modifica" per inviare ulteriori dati.

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