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  1. bill-g

    AVA Ultravalve schematic?

    I'm helping a friend whose AVA Ultravalve just went dead, tubes glowing, B+ is there, a bit high at 460V. No signal out. Sort of guessing that a lower voltage PS has failed. He can't find his manual. Anybody know if Van Alstine included schematics in there, and does anybody have a copy they...
    • bill-g
    • Thread
    • ava schematic ultravalve
    • Replies: 21
    • Forum: Tube Audio
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