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Revox a77 схема

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The well known reliability of the Revox A77 is a result of a professional design concept, a concept which successfully combines the advantages of a solidly built tape transport mechanism with those of an advanced electronic circuit design.

A 3 motor transport mechanism with electronically regulated capstan motor and solenoid operated servo brakes possesses few parts which are subject to mechanical wear. The use of a die-cast motor chassis and head support ensures that a high degree of mechanical precision and long term stability are maintained, even under excessively heavy use.

Wow and flutter: 0. Login or register to post reviews. Reviewed Dec 06th, by norman gates. I had fixed a number of these machines back in the s when I was an electronic repairman. The previous technician had butchered a lot of these decks and since I was able to order new parts easily , I got many of them to work.

I have aligned and adjusted them levels, bias, equalization, head alignment and replaced caps that have gone bad. I still own one of these, made many recordings on it, played some tapes recently on it-and it has such a fine, clear sound. Very nice tape recorder to have unfortunatly lost many years ago Have since bought another A77 MKIII and have servo board problems I am looking for a circuit diagram of this board however the manual in HiFi engine here does not have the I presume a later board info The board I have has a Trim Pot and Variable resistor trimmer There are no IC Chips on the board just transistors about 8 of them and one metal power transistor on a heatsink.

Any help would be appreciated..

При создании B77 инженерам была поставлена задача сделать не только идеальный продукт по критериям качества записи и воспроизведения, но и долговечный. В этой связи разработчики начали с "фундамента" - шасси. Независимо от того, насколько плавно работают двигатели или точно установлены головки, любая, малейшая деформация скажется на результате. Исключая данный фактор, Revox проектирует и изготавливает единую раму, а для снижения ее веса применение в быту использует алюминий с технологией "литье под давлением", где посадочные места под компоненты ЛПМ и блок головок заложены с прецизионной точностью.

Привод аппарата основан на трехмоторной системе, где сами двигатели разработаны и изготовлены компанией Studer-Revox самостоятельно. Такая задача была поставлена для полной оптимизации характеристик изделия. Например, когда начинается вращение тяжелых катушек, двигатели должны питаться более высоким стартовым напряжением, которое постепенно снижается через цепь симистора до нормального рабочего напряжения.

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