April 1, 2024
Motiograph 7505-A Mono Tube Amplifier
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You are bidding on a very good condition, working, Motiograph 7505-5 mono tube amplifier. Motiograph was founded by Alvah Roebuck in 1897 after he terminated his partnership with Richard Sears (Sears Roebuck.) The company was originally called Enterprise Optical Equipment Manufacturing Company which made and distributed high-quality 35mm motion picture projectors, sound equipment and accessories. After Roebuck left the company in 1924, it changed it's name to Motiograph which remained in existence until 1969. This amplifier was part of a movie projector system in a theatre in Casper, Wyoming and was manufactured around 1945 - 1946. I used it as a center-channel amplifier in a vintage Altec horn system. It produces approximately 20w output and is very clean. I have included a reproduction schematic and wiring diagram. Shipping costs are estimated for the Continental U.S. Seller will give a final price at the end of bidding.
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