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Prewar Hammonds with square edge keys - removal

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  • Prewar Hammonds with square edge keys - removal

    Hi folks

    As part of the repair work on my BC I am going to be changing the up and downstop felts. I have done this on all of my consoles. Usually I remove the keys at the same time to wash them thoroughly.

    When I had the drawbar base removed yesterday I noticed that these keys are attached and sprung in a different way to the ‘3 series organs I have owned. Is it a case of just removing each nut and spring to release the keys? When they are refitted are the nuts just replaced or do the keys have to be tensioned with a weight on top of them? I have read something in the past about putting weights on keys to get the level/spring force adjusted but I cannot find it now. I have googled this question a few times over the weekend but cannot find the answer.

    Best
    Dave
    Hammond C3, M102, XB3, XB5
    Lowrey Heritage DSO-1, H25-3, Yamaha E70
    Farfisa Compact Duo Mk2, Vox Continental 300, Korg BX3 Mk1, Leslie 122, 145
    www.drawbardave.co.uk

  • #2
    Originally posted by Drawbar Dave View Post
    Hi folks

    As part of the repair work on my BC I am going to be changing the up and downstop felts. I have done this on all of my consoles. Usually I remove the keys at the same time to wash them thoroughly.

    When I had the drawbar base removed yesterday I noticed that these keys are attached and sprung in a different way to the ‘3 series organs I have owned. Is it a case of just removing each nut and spring to release the keys? When they are refitted are the nuts just replaced or do the keys have to be tensioned with a weight on top of them? I have read something in the past about putting weights on keys to get the level/spring force adjusted but I cannot find it now. I have googled this question a few times over the weekend but cannot find the answer.

    Best
    Dave
    Yes, it's just a matter of removing the nuts, but they have to be tensioned afterwards as you suspect.

    Individually adjustable key tension - It's a rather neat feature that it's a shame that they took away on later models!
    Current organs: AV, M-3, A-100
    Current Leslies: 22H, 122, 770

    Comment


    • #3
      Originally posted by enor View Post
      Yes, it's just a matter of removing the nuts, but they have to be tensioned afterwards as you suspect.

      Individually adjustable key tension - It's a rather neat feature that it's a shame that they took away on later models!
      I had better read the service manual then!
      Hammond C3, M102, XB3, XB5
      Lowrey Heritage DSO-1, H25-3, Yamaha E70
      Farfisa Compact Duo Mk2, Vox Continental 300, Korg BX3 Mk1, Leslie 122, 145
      www.drawbardave.co.uk

      Comment


      • #4
        I’ve been through the service manual today and was unable to find any guidance. I found one Organ Forum post related to this subject which suggested 1oz weights for spinets and 2oz for consoles. There was also suggestions that 1 oz was used in the factory. Has anyone removed their keys on an early console for cleaning that can give advice on regulating the keys when they are replaced?
        Hammond C3, M102, XB3, XB5
        Lowrey Heritage DSO-1, H25-3, Yamaha E70
        Farfisa Compact Duo Mk2, Vox Continental 300, Korg BX3 Mk1, Leslie 122, 145
        www.drawbardave.co.uk

        Comment


        • #5
          Originally posted by Drawbar Dave View Post
          I’ve been through the service manual today and was unable to find any guidance. I found one Organ Forum post related to this subject which suggested 1oz weights for spinets and 2oz for consoles. There was also suggestions that 1 oz was used in the factory. Has anyone removed their keys on an early console for cleaning that can give advice on regulating the keys when they are replaced?
          I "took measurements" prior to removing them (I used metal washers as weights); then just set them at the same tension when re-installing. Don't overthink it.
          Current organs: AV, M-3, A-100
          Current Leslies: 22H, 122, 770

          Comment


          • #6
            Originally posted by enor View Post
            I "took measurements" prior to removing them (I used metal washers as weights); then just set them at the same tension when re-installing. Don't overthink it.
            Great idea Enor! Thanks
            Hammond C3, M102, XB3, XB5
            Lowrey Heritage DSO-1, H25-3, Yamaha E70
            Farfisa Compact Duo Mk2, Vox Continental 300, Korg BX3 Mk1, Leslie 122, 145
            www.drawbardave.co.uk

            Comment


            • #7
              I have a Northern Hammond BC with the spring and nut configuration. I removed all the keys and swapped them with keys with a radius on the sides and front (x3), all but 2 octaves which I beveled by hand. Can't tell the difference.

              According to sweet pete, he used a stack of nickels to get the action adjusted correctly. I forget how many so pm him for his advice. He swapped the keys on his BC as well.

              Comment

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