Business screen magazine (1946)

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■I 14 reel-to-reel Magnecord tape recorders are used at the Center for high speed duplication of tapes; note lightweight headset being used by technician. arc various audK> and video distril tion amplifiers. K. Ml'lTI-PuRPOSt Rl AR-PROJEf HON ARtA. This mcriis a clO' look since it is one of the mc. efficient functional arrangements our Center. Wc serve the larger alK^ lorium and three meeting rooms wi [ rear-screen projection (all use Pdi coat screens) from this "commoii projection area. I-et's take a look this working space and its many sp cial leatures. a. First, note the three-foot raiii platforms on which we've built fo projjction tables, these being mounti on separate floating platforms. Tl three-foot bases also stop vibratii from operating personnel movemet b. Our choice of top-quality projt tion equipment on each table is wor itemizing: Ciraflex I6mm sound pr< ectors; Kodak Super-8 sound fil is well provided for the Center. Both audio contri>l and video control rooms are equipped with indiviilual Revox audio tape recorders. TTie distribution center has 14 reel to reel rack-mounted Magnecord tape recorders used for program playback and recording as well as high-speed dubbing when reelto-reel tape duplicating is required. Electrical and rack space provision was also set up for cassette tape units. Both reel to reel and cassette recorders can be remotely controlled from any of our classrooms or wired stations. In operation, our system uses a double-channel Revox stereo tape recorder with half-track stereo playback and record heads. One track carries narration/music "information"; the other will contain inaudible "beeps" at one or more frequencies. These "beeps" trigger the slide projector visual advance mechanism in synchronization with the sound track. The classroom instructor may start, stop and rewind the tape from his remote location, thus completely controlling a presentation without any actual equipment in the classroom. We've (iiitiinialcd audio-visuals! 7. DisTRiHi TION System. To be fully understood, this system should be further explained. All of the onviiKiiinK \(>i4r(c<i previously noted (both audio and video) terminate in two M-paratc patch pa/wh: one for audio, the other for video signals. A control room technician may. by patching, distribute any desired material to any single receiving station or any selected Kfoup of receiving stations: classrooms, offices, screening room, etc. Each of these reception points is equipped with one or more wall mounted control panels (sec photo, page five). The panel carries an intercom handset w/ hanger-switch, a signal light, shut-off switch for concealed buzzer, a volume control knob, and a microphone jack. The jack plate for the remote control turret is a flush pl;rte. mounted on a 6" X 6" X 4" wall box required to hold the proper multipin connector for the remote control cable. In use. the instructor has a small control turret on his desk. Also included in our Central distribution console is an AM-FM tuner for off-the-air AM F"M signals which may be redistributed throughout all of our inter-connected facilities in the building. Also on the console rack Sales trainees can practice their aH proach to prospects and in rooms sy up for both aural and videotapii| media. Cassette tape duplication (on Pentagon equipment) enables Center to copy up 12 one-hour cassettes (dual track) within four minutes from single master tape