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T-Series Motor run capacitor replacement

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  • T-Series Motor run capacitor replacement

    I have a few questions about this before attempting the job myself.
    The capacitor in my T202 appears to be functioning properly, the motor runs at the correct speed and there's no bulging evident - but I don't want to take the risk of a PCB smoke bomb or oil spill in my studio. Mine dates to the mid-1960's - yikes!
    1. Does this capacitor store a charge for any significant period after being disconnected from power? - by this I mean, is it like some types of capacitors typically found in valve amplifiers which can store lethal voltages for weeks or even months at a time?
    2. If so, how do I safely discharge the capacitor?
    3. It is polarized? Or can I simply splice the motor wires to either terminal?
    4. Lastly: I live in Australia. Does anyone know the proper disposal procedure for objects containing PCB's?
    Thanks folks, I'm trying to be safe here
    Current:
    1971 T-202 with Carsten Meyer mods: Remove key click filters, single-trigger percussion, UM 16' drawbar volume correction. Lower Manual bass foldback.
    Korg CX3 (original 1980's analogue model).
    1967 Leslie 122 with custom inbuilt preamp on back panel for 1/4" line-level inputs, bass & treble controls. Horn diffusers intact.
    2009 Marshall 2061x HW Plexi head into Marshall 4x12 cabinet.

    Former:
    1964 C3
    196x M-102
    197x X5
    197x Leslie 825

  • #2
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    Current:
    1971 T-202 with Carsten Meyer mods: Remove key click filters, single-trigger percussion, UM 16' drawbar volume correction. Lower Manual bass foldback.
    Korg CX3 (original 1980's analogue model).
    1967 Leslie 122 with custom inbuilt preamp on back panel for 1/4" line-level inputs, bass & treble controls. Horn diffusers intact.
    2009 Marshall 2061x HW Plexi head into Marshall 4x12 cabinet.

    Former:
    1964 C3
    196x M-102
    197x X5
    197x Leslie 825

    Comment


    • #3
      1. These type capacitors can indeed store a charge for quite a time. However, if the capacitor is properly connected to a working motor, the capacitor will always discharge itself through the motor windings when the power is turned off.
      2. If you want to discharge the cap, just to make sure, simply short across the terminals with a screwdriver
      3. AC motor run capacitors are not polarized so you can hook either wire to either terminal.
      4. That is a great question! Around here we have hazardous material disposal events a couple times a year where you can get rid of old paint and other weird stuff.
      Tom in Tulsa

      Fooling with: 1969 E100, 1955 M3, 1963 M100, Leslie 720

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