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Hammond L102 transposed itself my 4 notes.

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  • Hammond L102 transposed itself my 4 notes.

    Hey all.
    I have a Hammond L101 that has transposed or shifted by 4 notes. So a C is now an A. It is in tune with itself, but down (or up) by 4 notes. I've searched for fixes on this issue but haven't found anything. All my searches come back with the fold back hack, which is something I would like to do in the future, but not a fix for my current issue. If anybody has any ideas or how I can rectify this, I appreciate the help
    Thanks a bunch!

    (Sorry I said L102 in the title, I meant L101).
    Last edited by nonsuchpro; 06-07-2019, 04:05 AM.

  • #2
    The run capacitor for the motor could be failing causing it to run slow. The originals contain toxic (PCB) material, avoid contact with any leakage.
    Tom in Tulsa

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

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    • #3
      tpappano is right, this is the typical tell-tale sign of a bad run capacitor.
      Current organs: AV, M-3, A-100
      Current Leslies: 22H, 122, 770

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      • #4
        Thank you! I will replace it and give an update.

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        • #5
          My goodness you guys are geniuses! The run capacitor gave me no meter reading. Luckily, I had an extra one from an L102 I took apart that read good (3.43MF on the meter) I just used wire nuts as a temporary fix to test it out. It worked! I'm not going to keep this one on there, I will order a brand new 3MF run cap and properly install that one. But hey, C is C! D is D! A is A! You made my day! Thank you soooooo much, I'm ecstatic! :->

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          • #6
            You're lucky neither cap exploded.....

            The dangers of PCB motor run caps ought to be much more emphatically publicised in the Hammond community...

            The youngest PCB cap is 44 years old...... the majority, from M's and L's, are getting up near 60 years old.
            These caps are a ticking time bomb
            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

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            • #7
              AND these caps can fail in a very dangerous way, shorting one of its internal sections to the metal casing - making every exposed metal part of the organ "hot" with mains voltage. These should all be replaced. And I've started using caps with an insulated casing instead of the stock metal-cased ones.
              Current organs: AV, M-3, A-100
              Current Leslies: 22H, 122, 770

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              • #8
                More information for new folks(including me) about dangers and safety and better insulated X2 and Y2 'safety caps' mentioned above:
                http://www.dairiki.org/HammondWiki/DeathCaps

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                • #9
                  No, that's not the same caps at all, drg... it's good reading, but doesn't really apply to the motor run cap.
                  Current organs: AV, M-3, A-100
                  Current Leslies: 22H, 122, 770

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                  • #10
                    Can someone link me to the best suitable 3 wire replacement?
                    Thanks!

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                    • #11
                      Originally posted by nonsuchpro View Post
                      Can someone link me to the best suitable 3 wire replacement?
                      Thanks!
                      Hm. The run cap only has 2 terminals. One of them has 2 wires connected to it, yes, but it's still just a 2-terminal (or 2 wire) capacitor.

                      I use ceiling fan capacitors.
                      Current organs: AV, M-3, A-100
                      Current Leslies: 22H, 122, 770

                      Comment


                      • #12
                        Originally posted by enor View Post

                        Hm. The run cap only has 2 terminals. One of them has 2 wires connected to it, yes, but it's still just a 2-terminal (or 2 wire) capacitor.

                        I use ceiling fan capacitors.
                        Gotcha. I wasn't sure because it's the only one I've ever seen like that.

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