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Aviation History
1948
1948 - 2058.PDF
22 Advertisements. FLIGHT DECEMBER 2ND, 1948 Sets a New High Standard R.50 COMMUNICATIONS RECEIVER This super-grade communications receiver incorporates the most highly developed techniques in modern receiver design. Five degrees of selectivity, including a crystal gate and crystal filter are provided, and the sensitivity is such that an input of between 1-5 microvolts, gives a signal/noise ratio of at least 10 dB over the entire frequency range of 13.5 to 26 kc/s and 95 kc/s to 32 Mc/s. Separate power units for A.C. or D.C. operation are available. iledifon Radio REDIFFUSION LIMITED, BROOMHILL ROAD, WANDSWORTH, S.W.I8 DESIGNERS & MANUFACTURERS OF RADIO COMMUNICATION & INDUSTRIAL ELECTRONIC EQUIPMENT Phnni PtJTney 5691 R.C. 201 POWER-DRIVEN HAND TOOLS ^*fegd. Trade Mart AIRCRAFT POLISHING The illustration shows Flextol machines in use for polishing exterior surfaces of a York of British South American Airways. The process used represents the only speedy and economical method of reducing skin friction and maintaining a perfect surface without impairing weather resisting properties. Flextol Type CLP machines are used in conjunction with Type 1355 Telescopic Stands, or as suspended types and the Polishing Handpieces are fitted with starter buttons. Full particulars on application to Dept. FJO. Sole Manufacturers and Patentees *. FLEXTOL ENGINEERING COMPANY LIMITED THE GREEN, EALING, LONDON. W.5 'Phones: EALing 6444,5,6. 'Grams:" Dominating ", Ealux, London. 9 565 B>8
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