Educational screen & audio-visual guide (c1956-1971])

Argus Slidf l'ri>jii till Sylvania Tru-Focus lamp; 4" f/3.3 lens; $54.95. ARGUS For more information elrole No. 106 on return postal card. THE INQUISITIVE GIANT This film shows the workings of a giant radio teleicope recently constructed at Jodrell Bank, England, designed to give a new account of the universe ond to draw o map of the heavens which may well revolutionize our present concept of space. Running Time: 30 min. Rental $10.00 • Salet $125.00 Send For Complete Catalog Contemporary films D«pl. ES 267 W. 25 St. N«w York 1, N. Y. ORegon 5-7220 Midwatt Offic* 614 Davit St., Evaniton, III. DAvIs 8-2411 FOR YOUR CLASSROOM THE lASY TO use >\OM^' A. N^V, • Theater Quality 16mm Sound Projector • Film Sofety Trips • Eotiest to Use • Lowest in Cost • Lightest in Weight • 50,000 Users Can't Be Wrong • lifotimo Guorantee THE EDUCATOR'S FRIEND Here's a professional projector for your educational and entertainment films. Precision built with rugged construction throughout. Weighs only 271/2 lbs. Complete $349.50 Write for Free Catalog ES I ItheHARWALDco.; SOUND: Equipment & Accessories Collins Speakers feature Radax (2cone) construction, long throw edgewound voice coil, slug-type magnet, glass coil form, die cast frame; mechanical crossover at 2000 cps on the 8" and at 1800 cps on the 12". 20-watt (40 peak) capacity. CS-8" @ 13.50; CS-12" @ $14.75. COLLINS. For more Information circle No. 107 on return postal card. Earphones in Jack-Case: set of 8 earphones pack into a carrying case which provides built-in jacks and a 5-foot cable with standard phone or other plug. The headphones have I 1245 Chicago Ave., Evanston, III. Ph: DA 8-7070 ' Audiotronics Earphones Vanyl headbands, double coils, Alnico magnets, phone plugs. AUDIOTRONICS. For more Information circle No. 108 on return postal card. 5-channel Intercom provides two complete sound channels, electronic voice intercom, room-to-room phone, and multiple time and emergency all-page overriding alarm signals. AM-FM radio tuner and 4-speed record changer, mixer unit, booster amplifiers, and Fail-Sale signals are all built-in, at control center. EXECUTONE For more Information circle No. 109 on return postal card. Headsets, combining Clevite BA200 crystal high impedance headphones with Turner dynamic (low impedance) boom type mike for listening-speaking. $34.25. Headphone alone $14.70. REDFIELD. For more information circle No. 110 on return postal card. Headphone Plug-In Boxes, heavy steel with rubber-toed base. 5-phone capacity $15; 8-phone $17.50; 10-phone $15. REDFIELD. For more Information circle No. Ill on return postal card. Intercom and Program Console. New model 12A245 combines manual 3speed record player, tape recorder, AM-FM tuner, 30-watt amplifier, talklisten and all-call switches, and intercom speaker microphone. DUKANE. For more Information circle No, 112 on return postal card. Lavalier Microphone featuring Dynaflex non-metallic diaphragm; omni directional, "pop-free" and "boomless" even when handled by inexperienced personnel; support clip and 25 ft of cable; either 50 or 200-ohi impedance; 4" long 1" diameter, u 3% oz. $36. Desk stand type M-40, 9%" long, $72.50. COLLINS For more information circle No. 11:^ on return postal card. Sphericon Tweeter, 3000-40,000 range built-in crossover at 3000; rated .'' watts in multi-speaker systems; dims; 120-degree dispersion in all planes; may be mounted front or real of baffle; 4V8" diam, 4" deep, $24.94. UNIVERSITY. For more Information circle No. 114 on return postal card. LANGUAGE LABS In these listings every effort is made to give just enough information to enable the reader to decide whether the' item is one on which he should seeki more. Trade announcements, especially from firms relatively new to the^ A-V field, often fail to include such important details as price, capacity and distinctive utilization characteristics. This applies especially to "new" lines such as language laboratories or teaching machines where the makers themselves may not yet be altogether certain of final design or pricing. Our readers can get all available further information by circling the request numbers on the inquiry card at the back' of this issue. Medallion Langlab Systems provides four drawer-housed tape recorders: console serving 25 student positions (expandable to 50 without adding Dukane Console Recorder , power) complete teacher student contact in which teacher may record or monitor any student's work without his knowledge. DUKANE. For more information circle No. 115 on return postal card. Porta-Control. Castored console carries teacher's control panel, recording and playback equipment, and' storage space for student mikes, earphones etc. REDFIELD. For more Information circle No. 116 on return postal card. "Tape-O-Matic" Recorder includes an "add-a-track" feature in dual channel use so that the user may add his own recording while hearing the prerecorded master (language or music) and may then play back both tracks 246 Educational Screen and Audiovisual Guide — Mat, 1960