Marconiphone 51

Marconi Co. (Marconiphone, Marconi's Wireless Telegraph Co. Ltd.), GB (not tubes - see also HMV His Master's Voice)

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  • Year
  • 1927
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 202736

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 5
  • Valves / Tubes
  • Tuned circuits
  • 3 AM circuit(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Line / Batteries (any type)
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Marconiphone 51 - Marconi Co. Marconiphone,
  • Shape
  • Tablemodel, low profile (big size).
  • Notes
  • The two HF amplifiers are coupled by neutralised tuned anodes, and all three circuits are tuned by interconnected condensers, with balancers for final adjustment. An elaborate switching arrangement, operated by a single knob (which also controls the filaments) throws long- or short-wave coils into the circuit at will. Screening is complete and the assembly is is built up an a metal chassis. Provision is made for operating the set on batteries or mains supply (AC or DC) in an ingenious manner. The connections are brought out to a row of small screw terminals, to which a multi-way supply cable is connected. The various alterations, such as series connected filaments for DC, extra leads for indirectly heated AC valves or parallel connections for batteries are automatically effected by using the appropriate type of connecting cable. The dial is calibrated in wavelengths as well as in arbitrary units. The set is also supplied with a pedestal base containing a reed-driven cone or a Rice-Kellogg moving coil loudspeaker.
  • Author
  • Model page created by John Koster. See "Data change" for further contributors.

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