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Working Over the D152

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  • Working Over the D152

    This evening I pulled the pedal solo control panel to replace the 17 paper capacitors in the 'subtractive synthesis' filter network. Also replaced the felts in the lower manual, will finish the capacitors and the upper felts tomorrow.

    edit: seems pics can't be uploaded at the moment, will try later
    Tom in Tulsa

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

  • #2
    Click image for larger version  Name:	20200323_225521.jpg Views:	2 Size:	124.2 KB ID:	724252
    Attached Files
    Tom in Tulsa

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

    Comment


    • #3
      New felt installed in both manuals, pedal solo panel rebuilt and will be installed this eve. This organ had screws in the front rails so I thought that would make everything easier, but not quite. Getting the rail unstuck from the lower rail it's mounted to was time consuming. I wound up taking out the cheekblocks and lower rail anyway because I didn't have good enough access to remove the downstop felt. I did the other manual the old fashioned way and it went fairly quick. Next big thing is to defoam the upper manual, which I'm hoping to do with it in place. Has anyone done that?
      Thanks!
      Tom in Tulsa

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

      Comment


      • #4
        That Pedal Solo Unit tone-shaping board with all the paper capacitors is definitely not one of Hammond's more easily serviceable components.
        I'm David. 'Dave' is someone else's name.

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        • #5
          You put it very politely, David 8) Once you have have it out, no problem 8) Getting it out though, you might as well overhaul the manuals too because you have to unbolt everything!
          Tom in Tulsa

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

          Comment


          • Drawbar Dave
            Drawbar Dave commented
            Editing a comment
            Yes I remember taking mine out! There were a couple of hidden L brackets that caused chaos :-/

        • #6
          Yeah, like that little one that goes in the front! Fortunately I remembered that one on the second attempt to put it back together 8)
          Tom in Tulsa

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

          Comment


          • Drawbar Dave
            Drawbar Dave commented
            Editing a comment
            Yes that's the one. Nothing beats refitting the four manual bolts, pushing the organ back against the wall and then finding that bracket on the floor!

        • #7
          Since you have that manual out, I want to ask you something. Its either my D or E above middle C on the great, sometimes I press it and get a medium pitch click sound. This click is at the key, not over the speaker, in other words it is something mechanical and would happen with the organ turned on or off. Usually happens when playing the adjacent lower whole step first. Always thought it was a felt thing. You think that may be possible?

          I have thought about posting a short video clip of this, but the click doesn't happen on any consistent basis.

          Thanks,
          Christopher
          Hammond RT-3, Boston studio upright piano, Fender Rhodes Mark I 73 stage piano.

          Comment


          • #8
            Sounds like it could be a "key comb" issue. Sticking up underneath each key is a metal finger with a small patch of felt fixed to it. Its purpose is to limit side-to-side movement of the keys. If these little felts become worn down, it's possible for the keys to click against each other if your fingers are pushing them sideways. Very annoying! My A100 has a few keys that do this, so I bought some used key combs off eBay to replace the worn ones (I haven't put them in yet). There are also little hacks that can be done with pieces of fabric and glue to fix them. Each individual 'comb' has fingers for twelve keys. If you look at rightmost key in the above picture you can see the felt peeking out from under the comb finger.
            Tom in Tulsa

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

            Comment


            • ChristopherDB113
              ChristopherDB113 commented
              Editing a comment
              Yeah, that sounds like the issue. Thanks for the info. Would be pretty invasive to get in and fix that one key so I'll probably tough it out for now.

            • tpappano
              tpappano commented
              Editing a comment
              It would be a good thing to do if you were already going into the manuals to replace the up/down stop felts, for example. The process looks a little frightening, but it's not really difficult. It takes a couple hours and following some basic steps in the correct order 8) Some suggest swapping the clacky comb with one from a lesser used section of the same keyboard.

          • #9
            Forum member Bobmann has got repairing key combs down to a fine art! https://youtu.be/l1ZtVX0NBx4
            Hammond A100, M102, X5, XB3, XB5, TTR-100,
            Lowrey DSO-1, H25-3, Yamaha E70, RA-100,
            Farfisa Compact Duo MK2, Vox Continental 300,
            Korg BX3 MK1, Leslie 145, 122.

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