My dad, who was a recording engineer, bought a used A77 in the mid sixties. The Revox tape decks were by far the best in those days. He had it checked out in their repair center which, I believe, was then in Syosset, Long Island. I don't know if they are still there. Also, check out this web page which has some info on servicing Revox tape decks: http://www.siber-sonic.com/broadcast/RevoxA77tips.html
