S Haller PU81 electrical schematic for circuit board

Discussion in 'Electric Horology' started by 4BEARS, Jun 21, 2020.

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  1. 4BEARS

    4BEARS New Member

    Jul 13, 2019
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    I just purchased a non-working Hamilton Ardmore clock. Neither the movement nor the pendulum work.
    The circuit board looks rather simple - crystal oscillator, an integrated circuit (frequency divider) and a few
    capacitors, one resistor, and one transistor. Does anyone have a schematic of this circuit? I could
    probably follow the circuit traces but am hoping this already exists. (S Haller PU81 movement).
     
  2. shutterbug

    shutterbug Moderator
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    Oct 19, 2005
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    I'll move this to electric horology for more input.
     

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