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Looking for a single triode tremolo circuit for a cathode biased princeton reverb

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  • Looking for a single triode tremolo circuit for a cathode biased princeton reverb

    The title says it all... :-)

    I'm preparing a new build.
    Based on the princeton reverb, but cathode biased.

    Cathode bias and the existing tremolo in the princeton reverb won't work together, so i'm looking for a single triode tremolo circuit for this build.

    Maybe you can point me in a direction, because i'm all out of ideas myself...

    Thx!

  • #2
    GA17RVT trem? You may want to add an intensity pot
    Building a better world (one tube amp at a time)

    "I have never had to invoke a formula to fight oscillation in a guitar amp."- Enzo

    Comment


    • #3
      another option

      Here's another option to throw in the mix.

      With respect, Tubenit

      http://www.schematicheaven.com/voxam...dge_reverb.pdf

      Comment


      • #4
        Originally posted by Tubenit View Post
        Here's another option to throw in the mix.

        With respect, Tubenit

        http://www.schematicheaven.com/voxam...dge_reverb.pdf

        I have been reading up on this cambridge circuit and the vox pacemaker is very similar. But the tremolo circuit is a little different.
        Depth is connected to a capacitor first in the cambridge, but to a resistor first in the pacemaker.
        The osilator cap arrangement is connected to ground in different ways...

        Which of both would you prefer?

        (I found the pacemaker schematic @ schematicheaven)

        thx!

        Comment


        • #5
          Successful mod - cathode biased with vibrato

          Hey folks thanks for the tips. I was modifying a 70's PR to be cathode biased and successfully incorporated a modified version of the pacemaker vibrato. I got the best results by using a 1 meg pot for the intensity, and removed the 680K resistor. I only use a .1 cap before the plate and it seemed to work the best.

          Thanks!
          Max

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