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Re: Hoping for a History Leason #3: Bell Howell Cinema tube amplifiers

m8o, hi. Filmosound was Bell & Howell's name for the line of 16mm projectors they made. They were built into a kind of sound blimp to muffle projector noise. As the upper freq range for 35mm optical sound on film (roughly 90 feet per minute past the sound head) is 10kH the upper freq limit for 16 mm (much slower feet per minute) is quite a bit lower. There were other 16mm sound projectors designed for similar service - Ampro, Curtis Wright Animatograph, RCA, etc. One would have to test the freq response of projector amp to find out upper and lower limits. Bell & Howell also made cameras. The B&H EyeMo handheld had a 100 foot roll capacity and saw service in every theater of war in WWII. Bell & Howell made excellent equipment. My guess would be that a B&H amp would have wide bandwidth. Have fun!


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