A40RG

Murphy Radio Ltd.; Welwyn Garden City

Data
Forum
Pictures
Collections

  • Year
  • 1937/1938
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 119772

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.
  • Details
  • Changer (Record changer)
  • 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: A40RG - Murphy Radio Ltd.; Welwyn
  • Shape
  • Console, Lowboy (legs < 50 %).
  • Dimensions (WHD)
  • 40 x 41 x 18 inch / 1016 x 1041 x 457 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 stages, giving audio range of 8500, 7000, 4500 and 3000 cps. 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 on 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. Record changer Garrard RD1A with piezo-electric pickup. Handles up to eight mixed ten or 12 in. records. Two loudspeakers differ in size. They are specially developed for this model, built into special sound chamber. Walls are dampened by 1.5 in of felt. Arrangement should restrict the outlet of sound to an aerea similar to that of the combined aereas of the diaphragms of both loudspeakers. The two loudspeakers were intended to give spartial -"steroscopic" - effect, according to the manufacturer and one contemporary test report. Two chassis used, power chassis at the base of the cabinet. This set is very rare today, it is considerd to give an even better performance than the A40C. Cabinet of Bombay rosewood and Bubinga. Inside of top lid lined with grey felt. Power consumption 200/220watts Price when new £85.
  • Net weight (2.2 lb = 1 kg)
  • 101.6 kg / 223 lb 12.6 oz (223.789 lb)
  • Price in first year of sale
  • 85.00 GBP
  • Mentioned in
  • The Wireless World March/3rd/1938 , The Gramophone, April 1938, p490f., Murphy Sales Brochure 1938
  • Literature/Schematics (1)
  • -- Original-techn. papers.
  • Author
  • Model page created by Miguel Bravo-Cos. See "Data change" for further contributors.

 Collections | Museums | Literature

Collections

The model is part of the collections of the following members.

 Forum