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A78C

Country:  Great Britain (UK)
Manufacturer / Brand:  Murphy Radio Ltd.; Welwyn Garden City
Year: 1939–1943 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 12: SP41 VP41 TH41 VP41 ME41 VP41 DD41 HL42DD HL41 Pen44 Pen44 UU8
Main principle Superhet with RF-stage; ZF/IF 465 kHz; 2 AF stage(s)
Tuned circuits 9 AM circuit(s)
Wave bands Broadcast, Long Wave and more than two Short Wave bands.
Details
Power type and voltage Alternating Current supply (AC) / 200-250 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out 15 W (unknown quality)
from Radiomuseum.org Model: A78C - Murphy Radio Ltd.; Welwyn
Material Wooden case
Shape Console with any shape - in general
Dimensions (WHD) 28.05 x 34.55 x 12.65 inch / 712 x 878 x 321 mm
Notes Design by Eden Minns. Two different rf-stages: On shortwave a SP41 is used as a rf-amplifier, on MW/LW a VP41. SW is restricted to Bandspread-tuning of 13, 16, 19, 21, 31, 41 and 49m bands plus VHF Band 1 (45MHz) for television sound only. This was of use only in the London area, but gave very good audio range. Variable selectivity in four stages, giving audio range of 8000, 5000, 4000 and 3000 Hz bandwith. In the two lower positions, an additional IF valve (VP41) is switched into the circuit, in order to improve gain and selectivity. In the higher positions, noise suppression is automatically introduced. Two LF stages. New alphabetical tuning with stations grouped according to wavebands, individually illuminated. Cathode ray tuning indicator. Wire remote control RA80 with push button tuning giving 2 lw-stations and 4 mw-stations as well as volume control. Wire up to 12 feet long, winds itself up after use. Loudspeaker specially developed for this model. Built in tilted upwards and outwards. This arrangement was supposed to give spartial -"stereoscopic" - effect as in A78RG. Two chassis used, power and output valves in chassis at the base of the cabinet. This set is considered to be an outstanding performer but for sound inferior to it's predecessor, the A40C. Power consumption 200/220watts Price when new £40. Price change December 1939: £42. PT (Purchase Tax) payable from October 1940. Price change October 1943: £52 10/0 plus PT. At least seven A78C are known to survive.
Price in first year of sale 40.00 GBP
Source of data - - Manufacturers Literature

Model page created by Sönke Gäthke. See "Data change" for further contributors.



All listed radios etc. from Murphy Radio Ltd.; Welwyn Garden City
Here you find 326 models, 229 with images and 206 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



  
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