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lk72

  1. sbcrockett

    LK72B ceramic disc capacitor labeled 5 NPO?

    During the replacement of some really flux filled component lead sleeving, I removed a ceramic disc capacitor that said 5 on it and 10%. The Scott parts list calls it a ceramic capacitor, labeling it 5 NPO and can be seen in the schematic below (C16). First off, I don't know what the value is...
  2. sbcrockett

    LK72B rectifier replacement and wiring

    Hello everyone, This is my first post. I've enjoyed reading about other LK72 and Fisher rebuilds and have learned so much from you all. I'm in the middle of re-capping a functioning LK72B that started having random buzzing issues and upon reading about the selenium rectifier and...
  3. ballywho

    LK72B - No volume, then scratchy low volume past noon

    Good day, I've got an LK-72B that, inexplicably, went from fully functional before physically moving it to how I describe in the title, post move: I have no volume before say noon/1 o'clock on either channel, at which point it's just low power/low volume scratchy sound. I've swapped out all...
    • ballywho
    • Thread
    • lk72 lk72b no sound no voltage
    • Replies: 11
    • Forum: Tube Audio
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