Projection engineering (Sept 1929-Nov 1930)

Projection Engineering, April, 1930 Page 35 Look at this Price for A High Quality Speaker Ideal for Theatre Installations Indoor or Outdoor Public Address Systems Height 11" Width 25%" Depth 19" FEATURES 1. Electro-Dynamic Speaker, (lO'/i-in. diameter). 2. 210 Power Amplifier. Fine eone quality. UX250 tube can also be used instead of UX210. 3. Supplies "B" voltage, if desired. i. Complete A.C. Electric operation. 5. Beautiful pencil striped walnut cabinet. 6. Just the thing for either indoor or outdoor amplification. AMERICAN li O L S T E U ELECTRO-DYNAMIC SPEAKER Combined with 210 Power Amplifier and "B" Supply Unit Our ability to buy these world-famous Kolster Speakers for cash enables us to offer them at remarkably low prices a fraction of their original cost. This Speaker is Kolster built, packed in the original Kolster packing, shipped direct to us from the Kolster factory. Every Electro-Dynamic Speaker is BRAND NEW; each bears the Kolster guarantee tag and original serial number. This finely matched, rugged unit comprises a complete heavy duty ElectroDynamic Speaker, including a 210 Power Amplifier with "B" Supply unit, all self-contained on a steel frame. It weighs 45 pounds without the cabinet. If desired the 210 Power Amplifier will also supply 22, 67 and 90 volts "B" Current. An automatic voltage regulator tube, UX874, maintains the "B" Voltage silent and steady. Speaker can be used with any phonograph pick-up and one additional audio stage is recommended between the pick-up and this Speaker. Whenever used, it -will bring out every shading and range of tone; every note is reproduced with utmost faithfulness, pure, undistorted. The following tubes are required for its operation: 2 UX281 (for full-wave rectification); 1 UX2 1 0 or UX250 (for super power amplification); 1 UX874 (for voltage regulation). A 20-ft. cable is included with each instrument. Operates direct from 50-60 cycle, 1 10-120 Volt A.C. current. Licensed Under Patents of the Radio Corp. of America and Lektophone Corp. LOTS OF 5 $ OR MORE 21 .50 Send for cur Bargain Bulletin No. 60, chocked full of real bargains. Filter Condensors. Transformers, Chokes, etc., which you may be able to use in your projection work. Introductory Price $24*50 SALES CO. 19-21 Warren Street, N. Y. C. EISLER ELECTRIC RADIO & LAMP MACHINES CONTRACT WORK SPECIAL MACHINERY PROBLEMS SOLVED A large organization financially responsible; rated, AAA1; over 40,000 square feet floor space; employes 450 men, well equipped and well qualified desire additional light type manufacturing work. We are interested in securing any good proposition in building any mechanical invention. Will finance suitable proposition. The Eisler Electric Corporation also manufactures a complete line of equipment employed in the making of Television Tubes, Radio Tubes and all other types of Lamps and Tubes. Estimates cheerfully submitted Eisler Electric Corporation Successors to the Eisler Engineering Co., Inc. Radio Tube Machinery Manufacturers 764 South Thirteenth St., Newark, N. J. 'Enthusiasm Will Grow With Every Show' A Double Hit! STRONG Automatic Reflector Arc Lamp j_ proje Produces the necessary increase in light to ct Movietone film in the same size and with the same intensity as silent full-sized film. .^. O— The continuous arc feed produces no foreign noise in projection of Movietone film. For Sale by Trustworthy Independent Supply Dealers Everywhere. THE STRONG ELECTRIC CORP. 2501 Lagrange St. Toledo, Ohio £*port Office: 44 Whitehall St., New York City, N. Y.