Kinematograph year book (1948)

Record Details:

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General Trade Directory. 647 HOW GOOD IS YOUR REPRODUCTION FROM STAGE EVENTS? IF YOU WANT THAT UNBELIEVABLE HIGH QUALITY SO REALISTIC THAT IT CANNOT BE DISTINGUISHED FROM THE ORIGINAL EXCEPT BY AN EXPERT, WE SHALL BE PLEASED TO ADVISE YOU. For the technical here are the details of the amplifier used and we claim it is the finest in the world. The AD/47 10-valve Cathode follower Triode amplifier has a distortion figure of less than .01% at 10 watts output. The damping factor of 40 times reduces the tendency of howl from microphone and the electrical distortion of the speaker. This distortion figure includes Johnson noise and thus the amplifier is far more silent than a battery-fed model. Compensation networks are provided and even a badly-worn record can be reproduced with amazing results. The basic response is flat from 20-20,000 cps. over triple-screened input and output transformer. May we send you further details ? VORTEXION LTD. 257-261. The Broadway, Wimbledon, London, S.W.19 Telephones: LIBerty 2814 & 6242-3. Telegrams: "Vorfexion, Wimble, London"