RADIO 1 EXHIBITION OLYMPIA SEPT I8to26 I S3 I
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m ~-v\_ r ■ i .. * ■■ A <rv - S' mBB/BBSsSSm 9&& \ ” r : 1 j? TH E NATIONAL g V RADIO 1 EXHIBITION OLYMPIA SEPT I8to26 I S3 I e Histone v/d Radic f The best in Radio NEW SETS. 3 Valve Screened Grid Band Pass 4 „ »> »» »> »» 5 „ Super Het. Transportable Table Models Consolettes Radiograms Biograms All Mains 3-Valve Screened Grid Band Pass Table Model, Cat. No. 457 etc. £19 19 O New Components. Permanent Magnet Moving Coil Speaker Carbon Microphone Sets and Components at Condenser Microphone THE NATIONAL RADIO EXHIBITION, 1931. Pick-ups and Arms Resistances STAND No. 41 DEMONSTRATION ROOM D25 Pre Set Condensers EDISON BELL, LIMITED, etc. LONDON S.E.15 Edison Bell Condensers—Best for all purposes. it BIBLIOTHEEK n.v.h. r, ACCUMULATORS for ii thighs tension D© not mm the ingenious Dagenite <'C!%ggt§gg: TeH Tale" : tv. device on i i- 7 y. ' ( STAND 15 \ \! •; ?> MAIN HALL THE NATIONAL ACCUMULATOR COMPANY LIMITED L 93 GT. PORTLAND STREET, LONDON, W.l ! D.4 t 1 \ WIRELESS BATTERY SURPRISES EXPERT 66Almost unbelievable results ” AN EXTRAORDINARY CONTRAST The writer of the following letter resolved to make a scientific test. He bought two H.T. batteries of different makes Here, in his own words, is the remarkable result. " Dear Sirs: You may be interested in an experiment I am at present making, the details of which l will supply you with from time to time. In March last, I built Mr. James' magnificent set, the ‘ Super 60,’ and I had a doubt as to what batteries to use. I finally decided on a 60 volt EVER READY and a 60 volt------------- my intention being to test them and then carry on with the best make. Day by day I have religiously carried out the tests, each day changing the batteries so that one took the full load every other day: (this in my opinion being the only method of testing accurately). The enclosed graph will show you the almost unbelievable results obtained so far. I am wondering if you have accidentally stored a mains unit in this battery ! The graph of the other battery 1 dare not send as it may get me into trouble with the makers. Sufficient to state that the EVER READY is worth well over double the price." Leonard Foley, Manchester. (this letter may be inspected at the office of the Company). This unsolicited testimonial confirms what the EVER READY Company has been telling the wireless public for years—that for elimination of distortion, for un wavering power and for long life, an EVER READY battery is better than any other battery on the market. I This is no accident, but the result of the exclusive process by which every EVER READY battery is made. There is an EVER READY battery to power every kind and size of set, portables included. Write for free list to the address below. We are exhibiting a‘ »he National THE EVER READY CO. GT. BRITAIN) LTD. HER Radio Exhibition CULES PLACE, HOLLO Stand No. Jt WAY. LONDON. N.7. 2 JBIBLIOTHEEK n.v.h.r. £KSy r- mrL ORGANISED BY THS PADIO MANUFACTURERS ASSOCIATION ASTQR HOUSE-ALOWYCH- LONOON WC 2 11 $ m •I g v mm ■mpmw n mi W is/official ...CATALOGUEIS jMff/ OFTHE ® NATIONAL RADIO % f ^EXHIBITION .• m) m V % w l-mm l OLYMPIA imt® wM to 2 6 :• 1931 3 f A •ijjJ STAND 26 ------ NATIONAL HALL------ DEMONSTRATION ROOM D4. /' ■ -EKC@- Famous as Pioneers and Leading Specialists in British All Electric Radio, present an ■ m. entirely new range of Radio- ; Grams, Consoles, Consolettes and Power Units. <- o- -o- New and exclusive features— Utmost simplicity and reliability— Extremely reasonable prices. ■o -o <- E. K. COLE, Ltd,, Dept. O.C., EKCO Works, Southend-on-Sea. I woburk JBIBLIOTHEEK N.V.H.R* CONTENTS. PAGE Official Appointments ........................................................................... 7 Plan of Stands on Ground Floor ................................................... 8-9 National Hall ... 8 Empire Hall ....................................................................................... 9 Plan of Stands and Demonstration Rooms on First Floor 10-11 National Hall (Demonstration Rooms) ....................................... 10 Empire Hall (Stands)........................................................................... 11 Index to Exhibitors ........................................................................... 13-15 Index to Telephone Numbers of Stands ....................................... 17 A Message from Lt.-Col. J. T. C. Moore-Brabazon, M.C., President of The Radio Manufacturers’ Association... 19 To Our Visitors—Mr. R. Milward Ellis, Chairman of The Radio Manufacturers’ Association and Chairman of the Exhibition’s Com mittee 21 A Message from the B.B.C.—Sir John Reith...................................... 23 Broadcasting Stations : Their Characteristics and Times of Transmission....................................... 24-31 British Stations ........................... 24 European Stations ........................... 25-29 Short Wave Stations........................... 30-31 General Notices ....................................... 39 Particulars of Exhibits ........................... ... 41-199 Stands on the Ground Floor : National Hall (Stands 1 to 47) ... 41-115 Empire Hall (Stands 51 to 108) ... ... 117-159 Loudspeaker Supply Arrangements and Special B.B.C. Exhibit 160-161 Stands and Demonstration Rooms on First Floor : Empire Hall (Stands 151 to 256)....................................... ... 163-194 National Hall (Demonstration Rooms) ............... ... 194-199 List of Members of The Radio Manufacturers’ Association ... 200-202 Classified Directory of Exhibits ....................................... ... 203-209 Index to Advertisers ........................ - ........................... 211 N.B._The greatest care has been taken in the compilation of this Catalogue, but the Organisers do not accept any responsibility for alterations, omissions or errors. 5 ! i i For daily last-minute information in foreign programmes .... for latest news of develop ments in wireless .... for expert answers to every-day radio queries—see The Daily Maily Britain’s great National Newspaper, which gives fullest attention to Britain’s most popular pastime. Because of its supreme pulling-power, leading radio manufacturers and dealers consistently use The Daily Mail as the basis of their selling campaigns. Reaching every town and village throughout Great Britain, it provides, in itself, a complete advertising campaign in the United Kingdom. DAILY MAIL 6 BIBLIOTHEEK •M.v.n.n* OFFICIAL APPOINTMENTS Press Agent: Mr. GARRY ALLIGHAN, Excel House, Whitcomb Street, W.C.2. (’Phone : Regent 7687 & Gerrard 3388.) Advertising Agents: MATHER & CROWTHER, LTD., New Bridge Street, E.C.4. Stand Fitters & Decorators: GROUND FLOOR STANDS F. STRUTT, Albion Works, Albion Street, Caledonian Road, N.l. DANCE FLOOR, DEMONSTRATION ROOMS AND STANDS ON FIRST FLOOR OLYMPIA, LTD., Kensington, London, W.14. Sign Writing: A. PERTON, 3, Beaconsfield Terrace Road, W:l4. Florists : STROUD BROS., LTD., 182, Green Lanes, Finsbury Park, N.4. Caterers : J. LYONS & CO., LTD., Cadby Hall, London, W.14. Stand Cleaners: GENERAL WINDOW CLEANING CO., 6, Avery Row, Bond Street, W.l. Lighting Installation: BROOKS & WHITE, Electrical Engineers, 10, Maclise Road, London, W.14. The Organisers are indebted to The Edison Swan Electric Co. Ltd., for advice and assistance given by their illumination engineers in connection with the Lighting Installation. i MUSIC i The Music throughout the Exhibition and on the Dance Floor will be produced by electrical reproduction from broadcasting or from gramophone records supplied by The Columbia Graphophone Co. Ltd. and The Gramophone Co. Ltd. PATENTS, TRADE MARKS AND DESIGNS. [NOTE : Inventors and others wishing to PROTECT INVENTIONS, REGISTER TRADE MARKS and DESIGNS (British and Foreign), or desirous of advice generally on Patents and similar matters, may refer their enquiries to Gee dc Co., Patent Agents and Trade Mark Agents (H. T. P. Gee, Patent and Trade Mark Agent, Great Britain; U.S.A. and Canadian Rcgd. Patent and Trade Mark Attorney ; Mem. Australian Inst, of Patent Attorneys; Member Radio Society of Great Britain; Assoc. Mem. Inst. Radio Engs., <fcc.) 0f 5i '52, Chancery Lane, W.C.2. ’Phone: Holborn 1526. Ask for Handbook “ PATENTS, TRADE MARKS & DESIGNS.”] \ 7 t h 2 5 t G) CM <2 H CO O CO i 0£ •t I r \ O CM in !o * B CM o M* I -I i ; u. 4 '■ i i t i >r o 2 CM I r> i<7> i D i ! r 1 CM o I I _J X a i i -I i O o CO i < ro :co in 4 i <fr h 1■i ^ z T I Z-* o -J £aaJ < i < I 2 z j-*w Z J I z CO <T> h Q o <0 CO I CD iN H i »i < < i i H 4 CO CO lA CO CO CO i U. S * i i -k. o I :! u I o </> cD ! < o CO CO .in I a. •J I I §-J 5 2 % S CM *3 t a t i 2 t «l ■ ■ 2 2 >< 3 n N 3 A V smnDiuod Ui Id w j Id 51 —• | ■ -"l An Index to Exhibitors appears on pages 13 & 15. For Plan of Stands and Demonstration Rooms on First Floor see pages 10 6? 11. A numerical list of Stands and Demonstration Rooms with particulars of Exhibits will be found on pages 41 to 199. A Classified Directory of Exhibits is included on pages 203 to 209. 8 aIaU t *=I S’ . t 2 3 -J >< SI Hi ¥ z. HI ■cm CM .• CO % UM [I] CO r*. >£> cxi m o r*. 5 t- (\J x o UJ CO cX lO o CO ex cx -I Si CM §9 -J 11 in < § T CO m CD I o in m UJ n H a. 1 a z UJ IX 00 $ (X in a § .rm 5 cO CO I <0 0) 00 IN o |N O CM co cx O CD C0 fM ex in CD CD * CO IX in O oO m Wr~* — o fM I Will SN0A1 t t 2 2 An Index to Exhibitors appears on pages 13 6? 15. For Plan of Stands and Demonstration Rooms on First Floor see pages 10 & 11. A numerical list of Stands and Demonstration Rooms with particulars of Exhibits will be found on pages 41 to 199.