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C2 vibrato problem

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  • C2 vibrato problem



    I need some help from all you hammond geniuses. I have recently purchased a C2. It sounds great without the vibrato, but when I turn the vibrato on either manual on I am having issues. There is a noticable "thump" when you hit either vibrato switch. The volume decrease by about one half. Also the sound produced sounds distorted or rough/muddy. There is definately vibrato working. The sound quality is constant and does not get" better then worse then better then worse" or anything like that. When turning the vibrato knob, I can hear it change still. any thoughts to what my problem would be? Thank you for reading my post.
    </p>

  • #2
    Re: C2 vibrato problem



    I don't have enough experience to determine if you need to have the scanner rebuilt or not, but that could be one problem. Either that, or checking to see if any of the capacitors on the vibrato line box have opened up - i believe you test this by checking continuity/resistance across each capacitor (organ off/unplugged) and see if any have given out. </p>

    Any chance you can record the instrument and the issue at hand? </p>

    </p>

    Sorry I can't be of more help! Stay tuned though, ideas will chime in soon enough.
    </p>

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    • #3
      Re: C2 vibrato problem

      [quote user="BassAl"]

      I need some help from all you hammond geniuses. I have recently purchased a C2. It sounds great without the vibrato, but when I turn the vibrato on either manual on I am having issues. There is a noticable "thump" when you hit either vibrato switch.[/quote]</p>

      You have some bad capacitors in the preamp. Check C2, C11. Thumping with the volume switch is C23.
      </p>

      The volume decrease by about one half. Also the sound produced sounds distorted or rough/muddy. There is definately vibrato working. The sound quality is constant and does not get" better then worse then better then worse" or anything like that. When turning the vibrato knob, I can hear it change still. any thoughts to what my problem would be? Thank you for reading my post.
      </p>
      </p>

      This is likely a bad resistor. R16 in V2 is a 2.2meg. These open up and reduce the gain of the tube. While looking at that, go ahead and replace R6 on V1 as it does the same for that tube.</p>

      I would consider changing most coupling caps while in there. C6, C16, C22, C12, maybe even C13.</p>

      Geoelectro
      </p>

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      • #4
        Re: C2 vibrato problem

        thats why I love this guy.

        Comment


        • #5
          Re: C2 vibrato problem



          Thanks, I will replace those parts and see what happens. I really appreciate the help.</p>

          </p>

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