PAGE #27 CONVERSIONS 2 - # 2249CM .679" x .906" Aperture Plate (1:2.55) or #2249UC .715" x .715" (1:2) aperture plate. 2 - * Series II, f1.9 coated,six-element objective Projection Lens of selected focal length to function with anamorphic lens. (See objective Lens List on Page 14 and Cinemascope Lens Chart on Page 30.) State type of anamor- phic with which the new objective lenses are to function. 2 - * Anamorphic Lens with support - as selected. (See Page 32) 2 - #13000-3S Sound head Mounting Plate ("R-9" to "2810" Projector)(If for other than "R-9", state type, manufacturer, model, and serial number.) 2 - #13000-3-2S Sound head Mounting Plate ("R-9" to "1604" magazine)(If for other than "R-9", state type, manufacturer, model and serial number.) 2 - * Cinemascope four-channel magnetic Sound Head - as selected, but state type for proper mounting adapters. 1 - * Four-channel Magnetic Pre-amplifier with built-in power supply, automatic control track pre-amplifier suppressor, balanced tandem volume control, and changeover switch - as selected. 2 - # 2804DA 20 watt Amplifier at 2% distortion. 3 - # 3701 Magnetic-pre-amplifier-"2804DA" amplifier shielded Cable and connector assembly. 2 - #12815-16 15" PM coaxial Speaker in enclosed bass-reflex baffle. (Only 1 required if utilized with "2810" system.) 2 - # 3714 100 foot amplifier-speaker Cable and connector assembly. CINEMASCOPE FILM UTILIZING FOUR MAGNETIC SOUND TRACKS - MODEL "10" (See Page 19.) To convert a "10" system to accommodate Cinemascope film with four-channel stereophonic sound reproduction, the following additional items are recommended for accommodating an audience up to 2,000 persons, subject to certain amendments dependent upon economic and individual auditorium requirements; arc lamp capacities should be carefully coordinated with the picture size required; in general, for a given light source and with a screen of excellent quality and condition, the projected picture width (1:2.55) may be increased under optimum projection conditions by 25% over the conventional picture width (1:1.33). In the event that the ratio of 1:2.55 is too severe, the #2249UC .715" x .715" aperture (1:2) may be specified permitting a projected picture width increment of approximately 33-1/3% under optimum conditions. 2 - # 2217C - Cinemascope Film Feed Sprocket. 2 - # 235C - Cinemascope Film Intermittent Sprocket. 2 - # 621C - Cinemascope Film Hold-back Sprocket. 2 - # 2191C - Cinemascope Film Sound Sprocket. Note: No changes are required in film shoes and rollers. 2 - # 2249CM .679" x .906" Aperture Plate (1:2.55) or #2249UC .715" x .715" (1:2) Aperture Plate. 2 - * Series II, f1.9 coated,six-element objective Projection Lens of selected focal length to function with anamorphic lens. (See objective Lens List on Page 14 and Cinemascope Lens Chart on Page 30.) State type of anamorphic with which the new objective lenses are to function. 2 - * Anamorphic Lens with support - as selected. (See Page 32.) 2 - #13000-3S Sound head Mounting Plate ("R-9" to "2810" projector)(If for other than "R-9", state type, manufacturer, model, and serial number.) 2 - #13000-3-2S Sound head Mounting Plate ("R-9" to "1604" magazine)(If for other than "R-9", state type, manufacturer, model and serial number.) 2 * Four-channel Cinemascope magnetic Sound Head - as selected, but state type for proper mounting adapters. 1 - * Four-channel Magnetic Pre-amplifier with built-in power supply, automatic control track pre-amplifier suppressor, balanced tandem volume controls, and changeover switch - as selected. 3 - # 2823DA Amplifier 40 watt at 2% distortion, dual section with built-in monitor speakers and volume control. 3 - # 3124 Dual "2823DA" amplifier bridging Cable for multiple operation of the two power sections in each "2823DA".