A40C

Murphy Radio Ltd.; Welwyn Garden City

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  • Year
  • 1937/1938
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 119760

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

 Technical Specifications

  • Number of Tubes
  • 15
  • Main principle
  • Superhet, double/triple conversion; ZF/IF 119 kHz
  • Wave bands
  • Broadcast, Long Wave and Short Wave.
  • Power type and voltage
  • Alternating Current supply (AC) / 200-260 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 12 inch = 30.5 cm
  • Power out
  • 12 W (unknown quality)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: A40C - Murphy Radio Ltd.; Welwyn
  • Shape
  • Console, Lowboy (legs < 50 %).
  • Dimensions (WHD)
  • 25 x 31 x 12 inch / 635 x 787 x 305 mm
  • Notes
  • Design by Eden Minns. Double conversion on SW, single on MW and LW. On shortwave signal is fed through special coils and tuning condenser into mediumwave section. Bandspread tuning. The shortwave range was selected by using a special sw-dial to the right of the mw/lw scale, fine tuning by using the mw/lw dial. SW-range 13.9-50 m. Variable selectivity in four steps, giving audio range of 8500 kc/c, 7000, 4500, 3000. AFC (Murphy: Automatic tuning correction, ATC) and noise suppression, automatically switched on in both high qualitiy positions. On high selectivity positions ATC and N/S could be switched in optionally via a switch on the back. A clutch switch on tuning condenser closing and cutting out ATC while tuning control is used. Alphabetical tuning. Cathode ray tuning indicator. Loudspeaker specially developed for this model. Build in tilted in order to direct sound towards mid-height aerea of the room. Two chassis used, power chassis at the base of the cabinet. This set is considerd to be at least one of the best build in pre-war Britain, giving best audio performance. Cabinet of Bombay rosewood, top thuya burr. Power consumption 200/220watts Price when new £35.
  • Net weight (2.2 lb = 1 kg)
  • 55.5 kg / 122 lb 3.9 oz (122.247 lb)
  • Price in first year of sale
  • 35.00 GBP
  • Mentioned in
  • The Gramophone, 10/1937, S.220, The Wireless World March/3rd/1938 , Murphy Sales Booklet 1938
  • Literature/Schematics (1)
  • -- Original-techn. papers.
  • Author
  • Model page created by Miguel Bravo-Cos. See "Data change" for further contributors.

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