Business screen magazine (1938)

ELECTRO ACOUSTIC PRODUCTS DIVISION oj The Magnarox Company, Incorporated General Oflires nnil flant Fori if ayne. Indiana S01J]\D SLIDEFILM PROJECTORS ^ The advertised >>logaii of The Mapiia\ox Cioni pa ny. "Pioneers in Sound Since 1911" is a fitting inlroduelioii to u review of the widely-used sound slidefilni projectors nianufaetured b> the Electro-Acoustir Produels Division of the ronip;in>. The liO.OOO lUustravox projector units reported in use range in price from S34.90 to SI 13.00. Newest arrival in the lUuslravox line is the Junior Model 108. suitable for individual and ^roup showings only up lo 25 people. Represented in Chicago by R. M. IVlcFarland Associates. 520 North Michigan Ave., or write direct lo Fort Wayne. Indiana for further particulars. OPERADIO MANUFACTURING CO. Genera! Offices and Plant St. Charles. lUinoia Export Division: 145 West Aryth Street, i\eiv York City if The Operadio Manufacturing (Ionipan> Si. Charles, Illinois, sound, public address sv^tenl and lout) speaker manufacturer for iiianv years and famed for its leadership in these fields, features two sound slide projector models: The Explainitone. a larger group selling unit. an<I Explainette., a small light-weight low-eost unit, recently developed after months of intensive research among producers and users of the slidefilni medium. All models feature all-metal construction with Mear-resisting baked finii^h. i Junior Model ■ 108" The iieirest of the Ulustravox line llu unit fnr indi^idual .onsunier, .l.-aler or other sales inlcr^ieMs. etc. before -mailer crou|>>. Fu!l 100-t*att extensible projection \*ith the >l3;;na\ax opening feature. * »mp3ci : actual dimensions 14" x 13" x 6" closed. \^ eishl 16 pounds. LarRe-sized film ma<:azine: rentitte control picture advance. Full-sized crystal pickup fur tracking; on records up to 16". Space for l»o 12" records, extra lilms H-iibin case. .\C operation: .4C-DC may be speciBedNatural tone reproduction fur individual presentation-. and especially suitable for sbouin;: lo small sroups not i.i t-xreed 2o perstm'. i Junior Model "lOlH" Suitable for audiences of UMI persons or more Milh re;: iilaled bit:h-lidelily sound to provide volume for audience<>( IMO or three up to a smalt auditorium. lOO-Matt projection; projector mounted on front door in patentecl Ma^navox feature to drop into position when door opens. Dimensions: 13" x 13%" x 6»i". Weight, slightly o*er 211 pounds. Small desk-type screen furnished as standard accessory. Latest type Ma^navox 6^/^ " speaker: constant -peed motor for AC operation, requires no adjustment. ver> little oiling;. t:arHes three 12" records. 3 films, inside case. (.arr^ing case covered in gray striped airplane fabric. \i'. operation, AC-DC may be specified. i Ulustravox "Senior" For the larger group shoiving The deluxe lart:e-audience llluslratox featuring 300-Malt projection, rewind takeup and amplification suitable for audiences up to se%'en or eight hundred people. IlloDiina* tion for best color and black and white projection results fin larpe screen. Fourtube amplification, eight-inch Magnaiox electro-dynamic speaker with curvilinear cone. Bemot able loud speaker . . . standard accessory equipment includes baffle and exien-ion cord. Dimensions: ISV^" x 1TV4" X T-'Ji,". Weight, .S8 pounds. Carries four 12" or 16" records; three films. All controls, including separate switches for projector, turn-table and amplifie mounted on rear panel uf carrying llluslratox models art slanda. 110 vol! allernating current; direct and altemalinn current trheii sperified al a s/»p/t case. Mole: all four fur nperation on (iO cycle, availahlp fur eiperatii create in price. i The Salesniaker V portable theatre in a single •;■-•'. Built-in translucent parchment screen and loud speaker just beloM screen permits instant showing by moving record tray from the front ■ >f the case; projector mounted in rear. Fcir larger audiences, speaker detaches for projection on ti all or tripod base screen. Dimensions: 18" x 18" x 7". Four 12" or 16" records, two films may be carried within case, \l~eight 29 pounds. Achieves unusual illusion of synchronized sound and picture presentation. AC operation. AC-DC mav be i Explainette-Open Operadio's new loir-priced unit llperadio's new low priced unit . . . Exptainelle . . . i> intended primarily for direct sales to individual eomumen. Houeier. it design is such that it can also be used for iar<;er =rnup meeting which would normally require a inci watt projector. It incorporates built-in screen. Operadio heavy duty 5" Permanent Magnet Dynamic Speaker, two tube antplilier:faclor> matched lone and volume. Available with either oO or ItIO wall projectors as specified. \ll-steel construction with durable baked finish. Turntable accommodates 10", 12" or 16" records. Crystal type pickup. Stowage for four lO" records, four film cups and needles. Ten foot power cord. Dimensions lO',^" x 11" X 5%". Weight 14 pounds. Available for either 1 IO * ..It AC or Df: as specified. i E\plaiiiette-(losed The -mall dimensiiin-. light weight and enclosed screen within the lop cover of ibe unit make the Explainetle the ideal unit to meet the user's specifications for field use in individual consumer and small group interviews. However, it has sufficient volume of sound so that when used with a 100 watt projector and a wall type screen, it can take care of relatively large group meetings . . All controls directly beneath the projector including combination on-off -wilch and volume control for amplifier, onoff switch for projeeclor lamp, and on-off switch for motor. Loud speaker located behind decorative ::rille on opposite -ide of rase from controls. All-sleel cabinet finished in a durable baked gray stipple finish which cannot be torn or i Explainitone-Open The projector for group showings Ihe unit for group showing ■ ■ Explainitone . . . (Iperadio's larger "deluxe" model sound slide film unit. is intended for showings before larger audiences. The Explainilone is available with lOO, 20O or 300 watt projectors. Standard equipment includes 8" heavy duty Permanent Vlagncl Dynamic Speaker and latest type amplifier, factory matched for volume and tone. Stowage for six 16" record-, -tx film cups, and spare projector lamps, all within the case. Available in either 110 volt AC, or AC-DC models as specified. Case dimensions 18" x 14%" x 9'/i". exclusive of record compartment lop. Weight AC Model — 33 lbs. 12 uz.; AC-DC Model — 32 tbs. 12 oz. i Explainitone-Closed K\\ models feature all-steel eonslruction without appreciable increase in weight. Explainitone ease finished in ilurable baked black stipple. The loud speaker is mounted in the detachable lop which permits speaker to be located aloni: side of screen. Extension speaker cable furnished. Provision for neat stowage of speaker extension cable and ]>ower cable. All controls conveniently located on the same side of unit as projector. They include volume and lone control with individual power control for amplifier, phonograph motor, and projector lamp. Remote control for projector anil SVE automatic filmslide take-up supplied at .lizht additional cost. k